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class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">nascondi</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">Inizio</div> </a> </li> <li id="toc-Struttura_generale_della_cellula_uovo" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Struttura_generale_della_cellula_uovo"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Struttura generale della cellula uovo</span> </div> </a> <ul id="toc-Struttura_generale_della_cellula_uovo-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Morfologia_comparata_della_cellula_uovo" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Morfologia_comparata_della_cellula_uovo"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Morfologia comparata della cellula uovo</span> </div> </a> <button aria-controls="toc-Morfologia_comparata_della_cellula_uovo-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Attiva/disattiva la sottosezione Morfologia comparata della cellula uovo</span> </button> <ul id="toc-Morfologia_comparata_della_cellula_uovo-sublist" class="vector-toc-list"> <li id="toc-Vertebrati" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Vertebrati"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.1</span> <span>Vertebrati</span> </div> </a> <ul id="toc-Vertebrati-sublist" class="vector-toc-list"> <li id="toc-Pesci" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#Pesci"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.1.1</span> <span>Pesci</span> </div> </a> <ul id="toc-Pesci-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Anfibi" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#Anfibi"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.1.2</span> <span>Anfibi</span> </div> </a> <ul id="toc-Anfibi-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Rettili" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#Rettili"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.1.3</span> <span>Rettili</span> </div> </a> <ul id="toc-Rettili-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Uccelli" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#Uccelli"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.1.4</span> <span>Uccelli</span> </div> </a> <ul id="toc-Uccelli-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Mammiferi" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#Mammiferi"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.1.5</span> <span>Mammiferi</span> </div> </a> <ul id="toc-Mammiferi-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> </ul> </li> <li id="toc-Bibliografia" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Bibliografia"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Bibliografia</span> </div> </a> <ul id="toc-Bibliografia-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Voci_correlate" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Voci_correlate"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Voci correlate</span> </div> </a> <ul id="toc-Voci_correlate-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Altri_progetti" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Altri_progetti"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Altri progetti</span> </div> </a> <ul id="toc-Altri_progetti-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Indice" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Mostra/Nascondi l'indice" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Mostra/Nascondi l'indice</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Uovo (biologia)</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Vai a una voce in un'altra lingua. Disponibile in 139 lingue" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-139" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">139 lingue</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-af mw-list-item"><a href="https://af.wikipedia.org/wiki/Eier_(biologie)" title="Eier (biologie) - afrikaans" lang="af" hreflang="af" data-title="Eier (biologie)" data-language-autonym="Afrikaans" data-language-local-name="afrikaans" class="interlanguage-link-target"><span>Afrikaans</span></a></li><li class="interlanguage-link interwiki-als mw-list-item"><a href="https://als.wikipedia.org/wiki/Ei" title="Ei - tedesco svizzero" lang="gsw" hreflang="gsw" data-title="Ei" data-language-autonym="Alemannisch" data-language-local-name="tedesco svizzero" class="interlanguage-link-target"><span>Alemannisch</span></a></li><li class="interlanguage-link interwiki-an mw-list-item"><a href="https://an.wikipedia.org/wiki/Uevo" title="Uevo - aragonese" lang="an" hreflang="an" data-title="Uevo" data-language-autonym="Aragonés" data-language-local-name="aragonese" class="interlanguage-link-target"><span>Aragonés</span></a></li><li class="interlanguage-link interwiki-ang mw-list-item"><a href="https://ang.wikipedia.org/wiki/%C3%86g" title="Æg - inglese antico" lang="ang" hreflang="ang" data-title="Æg" data-language-autonym="Ænglisc" data-language-local-name="inglese antico" class="interlanguage-link-target"><span>Ænglisc</span></a></li><li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%A8%D9%8A%D8%B6%D8%A9_(%D8%A3%D8%AD%D9%8A%D8%A7%D8%A1)" title="بيضة (أحياء) - arabo" lang="ar" hreflang="ar" data-title="بيضة (أحياء)" data-language-autonym="العربية" data-language-local-name="arabo" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-arz mw-list-item"><a href="https://arz.wikipedia.org/wiki/%D8%A8%D9%8A%D8%B6%D9%87" title="بيضه - arabo egiziano" lang="arz" hreflang="arz" data-title="بيضه" data-language-autonym="مصرى" data-language-local-name="arabo egiziano" class="interlanguage-link-target"><span>مصرى</span></a></li><li class="interlanguage-link interwiki-ast mw-list-item"><a href="https://ast.wikipedia.org/wiki/G%C3%BCevu_(biolox%C3%ADa)" title="Güevu (bioloxía) - asturiano" lang="ast" hreflang="ast" data-title="Güevu (bioloxía)" data-language-autonym="Asturianu" data-language-local-name="asturiano" class="interlanguage-link-target"><span>Asturianu</span></a></li><li class="interlanguage-link interwiki-atj mw-list-item"><a href="https://atj.wikipedia.org/wiki/Wow" title="Wow - atikamekw" lang="atj" hreflang="atj" data-title="Wow" data-language-autonym="Atikamekw" data-language-local-name="atikamekw" class="interlanguage-link-target"><span>Atikamekw</span></a></li><li class="interlanguage-link interwiki-ay mw-list-item"><a href="https://ay.wikipedia.org/wiki/K%27awna" title="K'awna - aymara" lang="ay" hreflang="ay" data-title="K'awna" data-language-autonym="Aymar aru" data-language-local-name="aymara" class="interlanguage-link-target"><span>Aymar aru</span></a></li><li class="interlanguage-link interwiki-az mw-list-item"><a href="https://az.wikipedia.org/wiki/Yumurta_(anatomiya)" title="Yumurta (anatomiya) - azerbaigiano" lang="az" hreflang="az" data-title="Yumurta (anatomiya)" data-language-autonym="Azərbaycanca" data-language-local-name="azerbaigiano" class="interlanguage-link-target"><span>Azərbaycanca</span></a></li><li class="interlanguage-link interwiki-ban mw-list-item"><a href="https://ban.wikipedia.org/wiki/Taluh" title="Taluh - balinese" lang="ban" hreflang="ban" data-title="Taluh" data-language-autonym="Basa Bali" data-language-local-name="balinese" class="interlanguage-link-target"><span>Basa Bali</span></a></li><li class="interlanguage-link interwiki-bar mw-list-item"><a href="https://bar.wikipedia.org/wiki/Oa" title="Oa - bavarese" lang="bar" hreflang="bar" data-title="Oa" data-language-autonym="Boarisch" data-language-local-name="bavarese" class="interlanguage-link-target"><span>Boarisch</span></a></li><li class="interlanguage-link interwiki-bat-smg mw-list-item"><a href="https://bat-smg.wikipedia.org/wiki/Kiau%C5%A1is" title="Kiaušis - samogitico" lang="sgs" hreflang="sgs" data-title="Kiaušis" data-language-autonym="Žemaitėška" data-language-local-name="samogitico" class="interlanguage-link-target"><span>Žemaitėška</span></a></li><li class="interlanguage-link interwiki-bcl mw-list-item"><a href="https://bcl.wikipedia.org/wiki/Sugok" title="Sugok - Central Bikol" lang="bcl" hreflang="bcl" data-title="Sugok" data-language-autonym="Bikol Central" data-language-local-name="Central Bikol" class="interlanguage-link-target"><span>Bikol Central</span></a></li><li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/%D0%AF%D0%B9%D1%86%D0%BE" title="Яйцо - bielorusso" lang="be" hreflang="be" data-title="Яйцо" data-language-autonym="Беларуская" data-language-local-name="bielorusso" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-be-x-old mw-list-item"><a href="https://be-tarask.wikipedia.org/wiki/%D0%AF%D0%B9%D0%BA%D0%B0" title="Яйка - Belarusian (Taraškievica orthography)" lang="be-tarask" hreflang="be-tarask" data-title="Яйка" data-language-autonym="Беларуская (тарашкевіца)" data-language-local-name="Belarusian (Taraškievica orthography)" class="interlanguage-link-target"><span>Беларуская (тарашкевіца)</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%AF%D0%B9%D1%86%D0%B5_(%D0%B7%D0%BE%D0%BE%D0%BB%D0%BE%D0%B3%D0%B8%D1%8F)" title="Яйце (зоология) - bulgaro" lang="bg" hreflang="bg" data-title="Яйце (зоология)" data-language-autonym="Български" data-language-local-name="bulgaro" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-bjn mw-list-item"><a href="https://bjn.wikipedia.org/wiki/Hintalu" title="Hintalu - banjar" lang="bjn" hreflang="bjn" data-title="Hintalu" data-language-autonym="Banjar" data-language-local-name="banjar" class="interlanguage-link-target"><span>Banjar</span></a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%A1%E0%A6%BF%E0%A6%AE" title="ডিম - bengalese" lang="bn" hreflang="bn" data-title="ডিম" data-language-autonym="বাংলা" data-language-local-name="bengalese" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-br mw-list-item"><a href="https://br.wikipedia.org/wiki/Vi" title="Vi - bretone" lang="br" hreflang="br" data-title="Vi" data-language-autonym="Brezhoneg" data-language-local-name="bretone" class="interlanguage-link-target"><span>Brezhoneg</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/Jaje" title="Jaje - bosniaco" lang="bs" hreflang="bs" data-title="Jaje" data-language-autonym="Bosanski" data-language-local-name="bosniaco" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Ou_(biologia)" title="Ou (biologia) - catalano" lang="ca" hreflang="ca" data-title="Ou (biologia)" data-language-autonym="Català" data-language-local-name="catalano" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-ckb mw-list-item"><a href="https://ckb.wikipedia.org/wiki/%DA%BE%DB%8E%D9%84%DA%A9%DB%95" title="ھێلکە - curdo centrale" lang="ckb" hreflang="ckb" data-title="ھێلکە" data-language-autonym="کوردی" data-language-local-name="curdo centrale" class="interlanguage-link-target"><span>کوردی</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Vejce" title="Vejce - ceco" lang="cs" hreflang="cs" data-title="Vejce" data-language-autonym="Čeština" data-language-local-name="ceco" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-cv mw-list-item"><a href="https://cv.wikipedia.org/wiki/%C3%87%C4%83%D0%BC%D0%B0%D1%80%D1%82%D0%B0" title="Çăмарта - ciuvascio" lang="cv" hreflang="cv" data-title="Çăмарта" data-language-autonym="Чӑвашла" data-language-local-name="ciuvascio" class="interlanguage-link-target"><span>Чӑвашла</span></a></li><li class="interlanguage-link interwiki-cy mw-list-item"><a href="https://cy.wikipedia.org/wiki/Wy" title="Wy - gallese" lang="cy" hreflang="cy" data-title="Wy" data-language-autonym="Cymraeg" data-language-local-name="gallese" class="interlanguage-link-target"><span>Cymraeg</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/%C3%86g" title="Æg - danese" lang="da" hreflang="da" data-title="Æg" data-language-autonym="Dansk" data-language-local-name="danese" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-dag mw-list-item"><a href="https://dag.wikipedia.org/wiki/Galli" title="Galli - Dagbani" lang="dag" hreflang="dag" data-title="Galli" data-language-autonym="Dagbanli" data-language-local-name="Dagbani" class="interlanguage-link-target"><span>Dagbanli</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Ei" title="Ei - tedesco" lang="de" hreflang="de" data-title="Ei" data-language-autonym="Deutsch" data-language-local-name="tedesco" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/%CE%91%CE%B2%CE%B3%CF%8C" title="Αβγό - greco" lang="el" hreflang="el" data-title="Αβγό" data-language-autonym="Ελληνικά" data-language-local-name="greco" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-eml mw-list-item"><a href="https://eml.wikipedia.org/wiki/%C3%93v" title="Óv - Emiliano-Romagnolo" lang="egl" hreflang="egl" data-title="Óv" data-language-autonym="Emiliàn e rumagnòl" data-language-local-name="Emiliano-Romagnolo" class="interlanguage-link-target"><span>Emiliàn e rumagnòl</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Egg" title="Egg - inglese" lang="en" hreflang="en" data-title="Egg" data-language-autonym="English" data-language-local-name="inglese" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Ovo" title="Ovo - esperanto" lang="eo" hreflang="eo" data-title="Ovo" data-language-autonym="Esperanto" data-language-local-name="esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Huevo_(biolog%C3%ADa)" title="Huevo (biología) - spagnolo" lang="es" hreflang="es" data-title="Huevo (biología)" data-language-autonym="Español" data-language-local-name="spagnolo" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Muna" title="Muna - estone" lang="et" hreflang="et" data-title="Muna" data-language-autonym="Eesti" data-language-local-name="estone" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Arrautza" title="Arrautza - basco" lang="eu" hreflang="eu" data-title="Arrautza" data-language-autonym="Euskara" data-language-local-name="basco" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%AA%D8%AE%D9%85_(%D8%B2%DB%8C%D8%B3%D8%AA%E2%80%8C%D8%B4%D9%86%D8%A7%D8%B3%DB%8C)" title="تخم (زیست‌شناسی) - persiano" lang="fa" hreflang="fa" data-title="تخم (زیست‌شناسی)" data-language-autonym="فارسی" data-language-local-name="persiano" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Muna" title="Muna - finlandese" lang="fi" hreflang="fi" data-title="Muna" data-language-autonym="Suomi" data-language-local-name="finlandese" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-fiu-vro mw-list-item"><a href="https://fiu-vro.wikipedia.org/wiki/Muna" title="Muna - võro" lang="vro" hreflang="vro" data-title="Muna" data-language-autonym="Võro" data-language-local-name="võro" class="interlanguage-link-target"><span>Võro</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/%C5%92uf_(biologie)" title="Œuf (biologie) - francese" lang="fr" hreflang="fr" data-title="Œuf (biologie)" data-language-autonym="Français" data-language-local-name="francese" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-frr mw-list-item"><a href="https://frr.wikipedia.org/wiki/Ai" title="Ai - frisone settentrionale" lang="frr" hreflang="frr" data-title="Ai" data-language-autonym="Nordfriisk" data-language-local-name="frisone settentrionale" class="interlanguage-link-target"><span>Nordfriisk</span></a></li><li class="interlanguage-link interwiki-fy mw-list-item"><a href="https://fy.wikipedia.org/wiki/Aai" title="Aai - frisone occidentale" lang="fy" hreflang="fy" data-title="Aai" data-language-autonym="Frysk" data-language-local-name="frisone occidentale" class="interlanguage-link-target"><span>Frysk</span></a></li><li class="interlanguage-link interwiki-ga mw-list-item"><a href="https://ga.wikipedia.org/wiki/Ubh" title="Ubh - irlandese" lang="ga" hreflang="ga" data-title="Ubh" data-language-autonym="Gaeilge" data-language-local-name="irlandese" class="interlanguage-link-target"><span>Gaeilge</span></a></li><li class="interlanguage-link interwiki-gd mw-list-item"><a href="https://gd.wikipedia.org/wiki/Ugh" title="Ugh - gaelico scozzese" lang="gd" hreflang="gd" data-title="Ugh" data-language-autonym="Gàidhlig" data-language-local-name="gaelico scozzese" class="interlanguage-link-target"><span>Gàidhlig</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Ovo_(biolox%C3%ADa)" title="Ovo (bioloxía) - galiziano" lang="gl" hreflang="gl" data-title="Ovo (bioloxía)" data-language-autonym="Galego" data-language-local-name="galiziano" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%91%D7%99%D7%A6%D7%94" title="ביצה - ebraico" lang="he" hreflang="he" data-title="ביצה" data-language-autonym="עברית" data-language-local-name="ebraico" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%85%E0%A4%A3%E0%A5%8D%E0%A4%A1%E0%A4%BE" title="अण्डा - hindi" lang="hi" hreflang="hi" data-title="अण्डा" data-language-autonym="हिन्दी" data-language-local-name="hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Jaje" title="Jaje - croato" lang="hr" hreflang="hr" data-title="Jaje" data-language-autonym="Hrvatski" data-language-local-name="croato" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-ht mw-list-item"><a href="https://ht.wikipedia.org/wiki/Ze" title="Ze - creolo haitiano" lang="ht" hreflang="ht" data-title="Ze" data-language-autonym="Kreyòl ayisyen" data-language-local-name="creolo haitiano" class="interlanguage-link-target"><span>Kreyòl ayisyen</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/Toj%C3%A1s_(biol%C3%B3gia)" title="Tojás (biológia) - ungherese" lang="hu" hreflang="hu" data-title="Tojás (biológia)" data-language-autonym="Magyar" data-language-local-name="ungherese" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/%D5%81%D5%B8%D6%82" title="Ձու - armeno" lang="hy" hreflang="hy" data-title="Ձու" data-language-autonym="Հայերեն" data-language-local-name="armeno" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Telur" title="Telur - indonesiano" lang="id" hreflang="id" data-title="Telur" data-language-autonym="Bahasa Indonesia" data-language-local-name="indonesiano" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-ig mw-list-item"><a href="https://ig.wikipedia.org/wiki/%C3%81kw%C3%A0" title="Ákwà - igbo" lang="ig" hreflang="ig" data-title="Ákwà" data-language-autonym="Igbo" data-language-local-name="igbo" class="interlanguage-link-target"><span>Igbo</span></a></li><li class="interlanguage-link interwiki-ik mw-list-item"><a href="https://ik.wikipedia.org/wiki/Mannik" title="Mannik - inupiak" lang="ik" hreflang="ik" data-title="Mannik" data-language-autonym="Iñupiatun" data-language-local-name="inupiak" class="interlanguage-link-target"><span>Iñupiatun</span></a></li><li class="interlanguage-link interwiki-io mw-list-item"><a href="https://io.wikipedia.org/wiki/Amniotala_ovo" title="Amniotala ovo - ido" lang="io" hreflang="io" data-title="Amniotala ovo" data-language-autonym="Ido" data-language-local-name="ido" class="interlanguage-link-target"><span>Ido</span></a></li><li class="interlanguage-link interwiki-is mw-list-item"><a href="https://is.wikipedia.org/wiki/Egg" title="Egg - islandese" lang="is" hreflang="is" data-title="Egg" data-language-autonym="Íslenska" data-language-local-name="islandese" class="interlanguage-link-target"><span>Íslenska</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E5%8D%B5" title="卵 - giapponese" lang="ja" hreflang="ja" data-title="卵" data-language-autonym="日本語" data-language-local-name="giapponese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-jv mw-list-item"><a href="https://jv.wikipedia.org/wiki/Endhog" title="Endhog - giavanese" lang="jv" hreflang="jv" data-title="Endhog" data-language-autonym="Jawa" data-language-local-name="giavanese" class="interlanguage-link-target"><span>Jawa</span></a></li><li class="interlanguage-link interwiki-kge mw-list-item"><a href="https://kge.wikipedia.org/wiki/Hatolui" title="Hatolui - Komering" lang="kge" hreflang="kge" data-title="Hatolui" data-language-autonym="Kumoring" data-language-local-name="Komering" class="interlanguage-link-target"><span>Kumoring</span></a></li><li class="interlanguage-link interwiki-kk mw-list-item"><a href="https://kk.wikipedia.org/wiki/%D0%96%D2%B1%D0%BC%D1%8B%D1%80%D1%82%D2%9B%D0%B0" title="Жұмыртқа - kazako" lang="kk" hreflang="kk" data-title="Жұмыртқа" data-language-autonym="Қазақша" data-language-local-name="kazako" class="interlanguage-link-target"><span>Қазақша</span></a></li><li class="interlanguage-link interwiki-kn mw-list-item"><a href="https://kn.wikipedia.org/wiki/%E0%B2%85%E0%B2%82%E0%B2%A1" title="ಅಂಡ - kannada" lang="kn" hreflang="kn" data-title="ಅಂಡ" data-language-autonym="ಕನ್ನಡ" data-language-local-name="kannada" class="interlanguage-link-target"><span>ಕನ್ನಡ</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EC%95%8C" title="알 - coreano" lang="ko" hreflang="ko" data-title="알" data-language-autonym="한국어" data-language-local-name="coreano" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-koi mw-list-item"><a href="https://koi.wikipedia.org/wiki/%D0%9A%D0%BE%D0%BB%D1%8C%D1%82%D1%8C" title="Кольть - permiaco" lang="koi" hreflang="koi" data-title="Кольть" data-language-autonym="Перем коми" data-language-local-name="permiaco" class="interlanguage-link-target"><span>Перем коми</span></a></li><li class="interlanguage-link interwiki-ks mw-list-item"><a href="https://ks.wikipedia.org/wiki/%D9%B9%DA%BE%D9%88%D9%97%D9%84" title="ٹھوٗل - kashmiri" lang="ks" hreflang="ks" data-title="ٹھوٗل" data-language-autonym="कॉशुर / کٲشُر" data-language-local-name="kashmiri" class="interlanguage-link-target"><span>कॉशुर / کٲشُر</span></a></li><li class="interlanguage-link interwiki-ku mw-list-item"><a href="https://ku.wikipedia.org/wiki/H%C3%AAk_(toxim)" title="Hêk (toxim) - curdo" lang="ku" hreflang="ku" data-title="Hêk (toxim)" data-language-autonym="Kurdî" data-language-local-name="curdo" class="interlanguage-link-target"><span>Kurdî</span></a></li><li class="interlanguage-link interwiki-ky mw-list-item"><a href="https://ky.wikipedia.org/wiki/%D0%96%D1%83%D0%BC%D1%83%D1%80%D1%82%D0%BA%D0%B0" title="Жумуртка - kirghiso" lang="ky" hreflang="ky" data-title="Жумуртка" data-language-autonym="Кыргызча" data-language-local-name="kirghiso" class="interlanguage-link-target"><span>Кыргызча</span></a></li><li class="interlanguage-link interwiki-la mw-list-item"><a href="https://la.wikipedia.org/wiki/Ovum" title="Ovum - latino" lang="la" hreflang="la" data-title="Ovum" data-language-autonym="Latina" data-language-local-name="latino" class="interlanguage-link-target"><span>Latina</span></a></li><li class="interlanguage-link interwiki-lb mw-list-item"><a href="https://lb.wikipedia.org/wiki/Ee" title="Ee - lussemburghese" lang="lb" hreflang="lb" data-title="Ee" data-language-autonym="Lëtzebuergesch" data-language-local-name="lussemburghese" class="interlanguage-link-target"><span>Lëtzebuergesch</span></a></li><li class="interlanguage-link interwiki-lfn mw-list-item"><a href="https://lfn.wikipedia.org/wiki/Ovo" title="Ovo - Lingua Franca Nova" lang="lfn" hreflang="lfn" data-title="Ovo" data-language-autonym="Lingua Franca Nova" data-language-local-name="Lingua Franca Nova" class="interlanguage-link-target"><span>Lingua Franca Nova</span></a></li><li class="interlanguage-link interwiki-lij mw-list-item"><a href="https://lij.wikipedia.org/wiki/%C3%96vo" title="Övo - ligure" lang="lij" hreflang="lij" data-title="Övo" data-language-autonym="Ligure" data-language-local-name="ligure" class="interlanguage-link-target"><span>Ligure</span></a></li><li class="interlanguage-link interwiki-ln mw-list-item"><a href="https://ln.wikipedia.org/wiki/L%C3%ADki" title="Líki - lingala" lang="ln" hreflang="ln" data-title="Líki" data-language-autonym="Lingála" data-language-local-name="lingala" class="interlanguage-link-target"><span>Lingála</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/Kiau%C5%A1inis" title="Kiaušinis - lituano" lang="lt" hreflang="lt" data-title="Kiaušinis" data-language-autonym="Lietuvių" data-language-local-name="lituano" class="interlanguage-link-target"><span>Lietuvių</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/Ola" title="Ola - lettone" lang="lv" hreflang="lv" data-title="Ola" data-language-autonym="Latviešu" data-language-local-name="lettone" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-mdf mw-list-item"><a href="https://mdf.wikipedia.org/wiki/%D0%90%D0%BB_(%D1%8D%D1%80%D1%8F%D1%84%D0%BE%D0%BD%D1%8C_%D1%82%D0%BE%D0%BD%D0%B0%D1%84%D0%BD%D0%B5%D0%BC%D0%B0%D0%BA%D1%81)" title="Ал (эряфонь тонафнемакс) - moksha" lang="mdf" hreflang="mdf" data-title="Ал (эряфонь тонафнемакс)" data-language-autonym="Мокшень" data-language-local-name="moksha" class="interlanguage-link-target"><span>Мокшень</span></a></li><li class="interlanguage-link interwiki-mg mw-list-item"><a href="https://mg.wikipedia.org/wiki/Atody" title="Atody - malgascio" lang="mg" hreflang="mg" data-title="Atody" data-language-autonym="Malagasy" data-language-local-name="malgascio" class="interlanguage-link-target"><span>Malagasy</span></a></li><li class="interlanguage-link interwiki-mhr mw-list-item"><a href="https://mhr.wikipedia.org/wiki/%D0%9C%D1%83%D0%BD%D0%BE" title="Муно - Eastern Mari" lang="mhr" hreflang="mhr" data-title="Муно" data-language-autonym="Олык марий" data-language-local-name="Eastern Mari" class="interlanguage-link-target"><span>Олык марий</span></a></li><li class="interlanguage-link interwiki-min mw-list-item"><a href="https://min.wikipedia.org/wiki/Talua" title="Talua - menangkabau" lang="min" hreflang="min" data-title="Talua" data-language-autonym="Minangkabau" data-language-local-name="menangkabau" class="interlanguage-link-target"><span>Minangkabau</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/%D0%88%D0%B0%D1%98%D1%86%D0%B5" title="Јајце - macedone" lang="mk" hreflang="mk" data-title="Јајце" data-language-autonym="Македонски" data-language-local-name="macedone" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-ml mw-list-item"><a href="https://ml.wikipedia.org/wiki/%E0%B4%AE%E0%B5%81%E0%B4%9F%E0%B5%8D%E0%B4%9F" title="മുട്ട - malayalam" lang="ml" hreflang="ml" data-title="മുട്ട" data-language-autonym="മലയാളം" data-language-local-name="malayalam" class="interlanguage-link-target"><span>മലയാളം</span></a></li><li class="interlanguage-link interwiki-mn mw-list-item"><a href="https://mn.wikipedia.org/wiki/%D3%A8%D0%BD%D0%B4%D3%A9%D0%B3" title="Өндөг - mongolo" lang="mn" hreflang="mn" data-title="Өндөг" data-language-autonym="Монгол" data-language-local-name="mongolo" class="interlanguage-link-target"><span>Монгол</span></a></li><li class="interlanguage-link interwiki-mni mw-list-item"><a href="https://mni.wikipedia.org/wiki/%EA%AF%8C%EA%AF%A6%EA%AF%94%EA%AF%A8%EA%AF%9D" title="ꯌꯦꯔꯨꯝ - manipuri" lang="mni" hreflang="mni" data-title="ꯌꯦꯔꯨꯝ" data-language-autonym="ꯃꯤꯇꯩ ꯂꯣꯟ" data-language-local-name="manipuri" class="interlanguage-link-target"><span>ꯃꯤꯇꯩ ꯂꯣꯟ</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Telur" title="Telur - malese" lang="ms" hreflang="ms" data-title="Telur" data-language-autonym="Bahasa Melayu" data-language-local-name="malese" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-my mw-list-item"><a href="https://my.wikipedia.org/wiki/%E1%80%A5_(%E1%80%90%E1%80%AD%E1%80%9B%E1%80%85%E1%80%B9%E1%80%86%E1%80%AC%E1%80%94%E1%80%BA)" title="ဥ (တိရစ္ဆာန်) - birmano" lang="my" hreflang="my" data-title="ဥ (တိရစ္ဆာန်)" data-language-autonym="မြန်မာဘာသာ" data-language-local-name="birmano" class="interlanguage-link-target"><span>မြန်မာဘာသာ</span></a></li><li class="interlanguage-link interwiki-myv mw-list-item"><a href="https://myv.wikipedia.org/wiki/%D0%90%D0%BB" title="Ал - erzya" lang="myv" hreflang="myv" data-title="Ал" data-language-autonym="Эрзянь" data-language-local-name="erzya" class="interlanguage-link-target"><span>Эрзянь</span></a></li><li class="interlanguage-link interwiki-nap mw-list-item"><a href="https://nap.wikipedia.org/wiki/Ovo" title="Ovo - napoletano" lang="nap" hreflang="nap" data-title="Ovo" data-language-autonym="Napulitano" data-language-local-name="napoletano" class="interlanguage-link-target"><span>Napulitano</span></a></li><li class="interlanguage-link interwiki-ne mw-list-item"><a href="https://ne.wikipedia.org/wiki/%E0%A4%85%E0%A4%A8%E0%A5%8D%E0%A4%A1%E0%A4%BE" title="अन्डा - nepalese" lang="ne" hreflang="ne" data-title="अन्डा" data-language-autonym="नेपाली" data-language-local-name="nepalese" class="interlanguage-link-target"><span>नेपाली</span></a></li><li class="interlanguage-link interwiki-new mw-list-item"><a href="https://new.wikipedia.org/wiki/%E0%A4%96%E0%A5%87%E0%A4%81%E0%A4%AF%E0%A5%8D" title="खेँय् - newari" lang="new" hreflang="new" data-title="खेँय्" data-language-autonym="नेपाल भाषा" data-language-local-name="newari" class="interlanguage-link-target"><span>नेपाल भाषा</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Ei_(dier)" title="Ei (dier) - olandese" lang="nl" hreflang="nl" data-title="Ei (dier)" data-language-autonym="Nederlands" data-language-local-name="olandese" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Egg" title="Egg - norvegese nynorsk" lang="nn" hreflang="nn" data-title="Egg" data-language-autonym="Norsk nynorsk" data-language-local-name="norvegese nynorsk" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-no badge-Q17437796 badge-featuredarticle mw-list-item" title="voce in vetrina"><a href="https://no.wikipedia.org/wiki/Egg" title="Egg - norvegese bokmål" lang="nb" hreflang="nb" data-title="Egg" data-language-autonym="Norsk bokmål" data-language-local-name="norvegese bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-nrm mw-list-item"><a href="https://nrm.wikipedia.org/wiki/Oeu" title="Oeu - Norman" lang="nrf" hreflang="nrf" data-title="Oeu" data-language-autonym="Nouormand" data-language-local-name="Norman" class="interlanguage-link-target"><span>Nouormand</span></a></li><li class="interlanguage-link interwiki-or mw-list-item"><a href="https://or.wikipedia.org/wiki/%E0%AC%85%E0%AC%A3%E0%AD%8D%E0%AC%A1%E0%AC%BE_(%E0%AC%9C%E0%AD%80%E0%AC%AC_%E0%AC%AC%E0%AC%BF%E0%AC%9C%E0%AD%8D%E0%AC%9E%E0%AC%BE%E0%AC%A8)" title="ଅଣ୍ଡା (ଜୀବ ବିଜ୍ଞାନ) - odia" lang="or" hreflang="or" data-title="ଅଣ୍ଡା (ଜୀବ ବିଜ୍ଞାନ)" data-language-autonym="ଓଡ଼ିଆ" data-language-local-name="odia" class="interlanguage-link-target"><span>ଓଡ଼ିଆ</span></a></li><li class="interlanguage-link interwiki-pa mw-list-item"><a href="https://pa.wikipedia.org/wiki/%E0%A8%86%E0%A8%82%E0%A8%A1%E0%A8%BE" title="ਆਂਡਾ - punjabi" lang="pa" hreflang="pa" data-title="ਆਂਡਾ" data-language-autonym="ਪੰਜਾਬੀ" data-language-local-name="punjabi" class="interlanguage-link-target"><span>ਪੰਜਾਬੀ</span></a></li><li class="interlanguage-link interwiki-pcd mw-list-item"><a href="https://pcd.wikipedia.org/wiki/U%C3%AB" title="Uë - piccardo" lang="pcd" hreflang="pcd" data-title="Uë" data-language-autonym="Picard" data-language-local-name="piccardo" class="interlanguage-link-target"><span>Picard</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Jajo_(biologia)" title="Jajo (biologia) - polacco" lang="pl" hreflang="pl" data-title="Jajo (biologia)" data-language-autonym="Polski" data-language-local-name="polacco" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pnb mw-list-item"><a href="https://pnb.wikipedia.org/wiki/%D8%A2%D9%86%DA%88%D8%A7" title="آنڈا - Western Punjabi" lang="pnb" hreflang="pnb" data-title="آنڈا" data-language-autonym="پنجابی" data-language-local-name="Western Punjabi" class="interlanguage-link-target"><span>پنجابی</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Ovo" title="Ovo - portoghese" lang="pt" hreflang="pt" data-title="Ovo" data-language-autonym="Português" data-language-local-name="portoghese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-qu mw-list-item"><a href="https://qu.wikipedia.org/wiki/Runtu" title="Runtu - quechua" lang="qu" hreflang="qu" data-title="Runtu" data-language-autonym="Runa Simi" data-language-local-name="quechua" class="interlanguage-link-target"><span>Runa Simi</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Ou" title="Ou - rumeno" lang="ro" hreflang="ro" data-title="Ou" data-language-autonym="Română" data-language-local-name="rumeno" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-roa-rup mw-list-item"><a href="https://roa-rup.wikipedia.org/wiki/Ou" title="Ou - arumeno" lang="rup" hreflang="rup" data-title="Ou" data-language-autonym="Armãneashti" data-language-local-name="arumeno" class="interlanguage-link-target"><span>Armãneashti</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%AF%D0%B9%D1%86%D0%BE" title="Яйцо - russo" lang="ru" hreflang="ru" data-title="Яйцо" data-language-autonym="Русский" data-language-local-name="russo" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sah mw-list-item"><a href="https://sah.wikipedia.org/wiki/%D0%A1%D1%8B%D0%BC%D1%8B%D1%8B%D1%82" title="Сымыыт - sacha" lang="sah" hreflang="sah" data-title="Сымыыт" data-language-autonym="Саха тыла" data-language-local-name="sacha" class="interlanguage-link-target"><span>Саха тыла</span></a></li><li class="interlanguage-link interwiki-sat mw-list-item"><a href="https://sat.wikipedia.org/wiki/%E1%B1%B5%E1%B1%A4%E1%B1%9E%E1%B1%A4" title="ᱵᱤᱞᱤ - santali" lang="sat" hreflang="sat" data-title="ᱵᱤᱞᱤ" data-language-autonym="ᱥᱟᱱᱛᱟᱲᱤ" data-language-local-name="santali" class="interlanguage-link-target"><span>ᱥᱟᱱᱛᱟᱲᱤ</span></a></li><li class="interlanguage-link interwiki-scn mw-list-item"><a href="https://scn.wikipedia.org/wiki/Ovu_(biolugg%C3%ACa)" title="Ovu (bioluggìa) - siciliano" lang="scn" hreflang="scn" data-title="Ovu (bioluggìa)" data-language-autonym="Sicilianu" data-language-local-name="siciliano" class="interlanguage-link-target"><span>Sicilianu</span></a></li><li class="interlanguage-link interwiki-sco mw-list-item"><a href="https://sco.wikipedia.org/wiki/Egg" title="Egg - scozzese" lang="sco" hreflang="sco" data-title="Egg" data-language-autonym="Scots" data-language-local-name="scozzese" class="interlanguage-link-target"><span>Scots</span></a></li><li class="interlanguage-link interwiki-sd mw-list-item"><a href="https://sd.wikipedia.org/wiki/%D8%A2%D9%86%D9%88" title="آنو - sindhi" lang="sd" hreflang="sd" data-title="آنو" data-language-autonym="سنڌي" data-language-local-name="sindhi" class="interlanguage-link-target"><span>سنڌي</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Jaje" title="Jaje - serbo-croato" lang="sh" hreflang="sh" data-title="Jaje" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="serbo-croato" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-si mw-list-item"><a href="https://si.wikipedia.org/wiki/%E0%B6%B6%E0%B7%92%E0%B6%AD%E0%B7%8A%E0%B6%AD%E0%B6%BB%E0%B6%BA" title="බිත්තරය - singalese" lang="si" hreflang="si" data-title="බිත්තරය" data-language-autonym="සිංහල" data-language-local-name="singalese" class="interlanguage-link-target"><span>සිංහල</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Egg_(biology)" title="Egg (biology) - Simple English" lang="en-simple" hreflang="en-simple" data-title="Egg (biology)" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/Vajce" title="Vajce - slovacco" lang="sk" hreflang="sk" data-title="Vajce" data-language-autonym="Slovenčina" data-language-local-name="slovacco" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Jajce" title="Jajce - sloveno" lang="sl" hreflang="sl" data-title="Jajce" data-language-autonym="Slovenščina" data-language-local-name="sloveno" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-sn mw-list-item"><a href="https://sn.wikipedia.org/wiki/Zai" title="Zai - shona" lang="sn" hreflang="sn" data-title="Zai" data-language-autonym="ChiShona" data-language-local-name="shona" class="interlanguage-link-target"><span>ChiShona</span></a></li><li class="interlanguage-link interwiki-sq mw-list-item"><a href="https://sq.wikipedia.org/wiki/Veza" title="Veza - albanese" lang="sq" hreflang="sq" data-title="Veza" data-language-autonym="Shqip" data-language-local-name="albanese" class="interlanguage-link-target"><span>Shqip</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%88%D0%B0%D1%98%D0%B5" title="Јаје - serbo" lang="sr" hreflang="sr" data-title="Јаје" data-language-autonym="Српски / srpski" data-language-local-name="serbo" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-su mw-list-item"><a href="https://su.wikipedia.org/wiki/Endog" title="Endog - sundanese" lang="su" hreflang="su" data-title="Endog" data-language-autonym="Sunda" data-language-local-name="sundanese" class="interlanguage-link-target"><span>Sunda</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/%C3%84gg" title="Ägg - svedese" lang="sv" hreflang="sv" data-title="Ägg" data-language-autonym="Svenska" data-language-local-name="svedese" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-sw mw-list-item"><a href="https://sw.wikipedia.org/wiki/Yai" title="Yai - swahili" lang="sw" hreflang="sw" data-title="Yai" data-language-autonym="Kiswahili" data-language-local-name="swahili" class="interlanguage-link-target"><span>Kiswahili</span></a></li><li class="interlanguage-link interwiki-ta mw-list-item"><a href="https://ta.wikipedia.org/wiki/%E0%AE%AE%E0%AF%81%E0%AE%9F%E0%AF%8D%E0%AE%9F%E0%AF%88" title="முட்டை - tamil" lang="ta" hreflang="ta" data-title="முட்டை" data-language-autonym="தமிழ்" data-language-local-name="tamil" class="interlanguage-link-target"><span>தமிழ்</span></a></li><li class="interlanguage-link interwiki-tay mw-list-item"><a href="https://tay.wikipedia.org/wiki/bazing" title="bazing - Tayal" lang="tay" hreflang="tay" data-title="bazing" data-language-autonym="Tayal" data-language-local-name="Tayal" class="interlanguage-link-target"><span>Tayal</span></a></li><li class="interlanguage-link interwiki-tdd mw-list-item"><a href="https://tdd.wikipedia.org/wiki/%E1%A5%91%E1%A5%AD%E1%A5%B1" title="ᥑᥭᥱ - Tai Nuea" lang="tdd" hreflang="tdd" data-title="ᥑᥭᥱ" data-language-autonym="ᥖᥭᥰ ᥖᥬᥲ ᥑᥨᥒᥰ" data-language-local-name="Tai Nuea" class="interlanguage-link-target"><span>ᥖᥭᥰ ᥖᥬᥲ ᥑᥨᥒᥰ</span></a></li><li class="interlanguage-link interwiki-te mw-list-item"><a href="https://te.wikipedia.org/wiki/%E0%B0%97%E0%B1%81%E0%B0%A1%E0%B1%8D%E0%B0%A1%E0%B1%81" title="గుడ్డు - telugu" lang="te" hreflang="te" data-title="గుడ్డు" data-language-autonym="తెలుగు" data-language-local-name="telugu" class="interlanguage-link-target"><span>తెలుగు</span></a></li><li class="interlanguage-link interwiki-tg mw-list-item"><a href="https://tg.wikipedia.org/wiki/%D0%A2%D1%83%D1%85%D0%BC" title="Тухм - tagico" lang="tg" hreflang="tg" data-title="Тухм" data-language-autonym="Тоҷикӣ" data-language-local-name="tagico" class="interlanguage-link-target"><span>Тоҷикӣ</span></a></li><li class="interlanguage-link interwiki-tl mw-list-item"><a href="https://tl.wikipedia.org/wiki/Itlog" title="Itlog - tagalog" lang="tl" hreflang="tl" data-title="Itlog" data-language-autonym="Tagalog" data-language-local-name="tagalog" class="interlanguage-link-target"><span>Tagalog</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Yumurta_(biyoloji)" title="Yumurta (biyoloji) - turco" lang="tr" hreflang="tr" data-title="Yumurta (biyoloji)" data-language-autonym="Türkçe" data-language-local-name="turco" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-tt mw-list-item"><a href="https://tt.wikipedia.org/wiki/%D0%99%D0%BE%D0%BC%D1%8B%D1%80%D0%BA%D0%B0" title="Йомырка - tataro" lang="tt" hreflang="tt" data-title="Йомырка" data-language-autonym="Татарча / tatarça" data-language-local-name="tataro" class="interlanguage-link-target"><span>Татарча / tatarça</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%AF%D0%B9%D1%86%D0%B5" title="Яйце - ucraino" lang="uk" hreflang="uk" data-title="Яйце" data-language-autonym="Українська" data-language-local-name="ucraino" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-ur mw-list-item"><a href="https://ur.wikipedia.org/wiki/%D8%A7%D9%86%DA%88%D8%A7" title="انڈا - urdu" lang="ur" hreflang="ur" data-title="انڈا" data-language-autonym="اردو" data-language-local-name="urdu" class="interlanguage-link-target"><span>اردو</span></a></li><li class="interlanguage-link interwiki-uz mw-list-item"><a href="https://uz.wikipedia.org/wiki/Tuxum" title="Tuxum - uzbeco" lang="uz" hreflang="uz" data-title="Tuxum" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="uzbeco" class="interlanguage-link-target"><span>Oʻzbekcha / ўзбекча</span></a></li><li class="interlanguage-link interwiki-vec mw-list-item"><a href="https://vec.wikipedia.org/wiki/V%C3%B3vo" title="Vóvo - veneto" lang="vec" hreflang="vec" data-title="Vóvo" data-language-autonym="Vèneto" data-language-local-name="veneto" class="interlanguage-link-target"><span>Vèneto</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/Tr%E1%BB%A9ng_(sinh_h%E1%BB%8Dc)" title="Trứng (sinh học) - vietnamita" lang="vi" hreflang="vi" data-title="Trứng (sinh học)" data-language-autonym="Tiếng Việt" data-language-local-name="vietnamita" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-vo mw-list-item"><a href="https://vo.wikipedia.org/wiki/N%C3%B6g" title="Nög - volapük" lang="vo" hreflang="vo" data-title="Nög" data-language-autonym="Volapük" data-language-local-name="volapük" class="interlanguage-link-target"><span>Volapük</span></a></li><li class="interlanguage-link interwiki-wa mw-list-item"><a href="https://wa.wikipedia.org/wiki/O%C3%BB_(zolodjeye)" title="Oû (zolodjeye) - vallone" lang="wa" hreflang="wa" data-title="Oû (zolodjeye)" data-language-autonym="Walon" data-language-local-name="vallone" class="interlanguage-link-target"><span>Walon</span></a></li><li class="interlanguage-link interwiki-war mw-list-item"><a href="https://war.wikipedia.org/wiki/Bunay" title="Bunay - waray" lang="war" hreflang="war" data-title="Bunay" data-language-autonym="Winaray" data-language-local-name="waray" class="interlanguage-link-target"><span>Winaray</span></a></li><li class="interlanguage-link interwiki-wuu mw-list-item"><a href="https://wuu.wikipedia.org/wiki/%E8%9B%8B" title="蛋 - wu" lang="wuu" hreflang="wuu" data-title="蛋" data-language-autonym="吴语" data-language-local-name="wu" class="interlanguage-link-target"><span>吴语</span></a></li><li class="interlanguage-link interwiki-yi mw-list-item"><a href="https://yi.wikipedia.org/wiki/%D7%90%D7%99%D7%99" title="איי - yiddish" lang="yi" hreflang="yi" data-title="איי" data-language-autonym="ייִדיש" data-language-local-name="yiddish" class="interlanguage-link-target"><span>ייִדיש</span></a></li><li class="interlanguage-link interwiki-za mw-list-item"><a href="https://za.wikipedia.org/wiki/Gyaeq" title="Gyaeq - zhuang" lang="za" hreflang="za" data-title="Gyaeq" data-language-autonym="Vahcuengh" data-language-local-name="zhuang" class="interlanguage-link-target"><span>Vahcuengh</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E5%8D%B5" title="卵 - cinese" lang="zh" hreflang="zh" data-title="卵" data-language-autonym="中文" data-language-local-name="cinese" class="interlanguage-link-target"><span>中文</span></a></li><li class="interlanguage-link interwiki-zh-min-nan mw-list-item"><a href="https://zh-min-nan.wikipedia.org/wiki/Nn%CC%84g" title="Nn̄g - min nan" lang="nan" hreflang="nan" data-title="Nn̄g" data-language-autonym="閩南語 / Bân-lâm-gú" data-language-local-name="min nan" class="interlanguage-link-target"><span>閩南語 / Bân-lâm-gú</span></a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/%E8%86%A5" title="膥 - cantonese" lang="yue" hreflang="yue" data-title="膥" data-language-autonym="粵語" data-language-local-name="cantonese" 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id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="it" dir="ltr"><figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Adolphe_Millot_oeufs-fixed.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/5/54/Adolphe_Millot_oeufs-fixed.jpg/260px-Adolphe_Millot_oeufs-fixed.jpg" decoding="async" width="260" height="345" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/54/Adolphe_Millot_oeufs-fixed.jpg/390px-Adolphe_Millot_oeufs-fixed.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/54/Adolphe_Millot_oeufs-fixed.jpg/520px-Adolphe_Millot_oeufs-fixed.jpg 2x" data-file-width="5618" data-file-height="7456" /></a><figcaption>72 diversi tipi di uova d'animali, disegnati da <a href="/w/index.php?title=Adolphe_Millot&action=edit&redlink=1" class="new" title="Adolphe Millot (la pagina non esiste)">Adolphe Millot</a> per il <i><a href="/w/index.php?title=Nouveau_Larousse_Illustr%C3%A9&action=edit&redlink=1" class="new" title="Nouveau Larousse Illustré (la pagina non esiste)">Nouveau Larousse Illustré</a></i> (<a href="/wiki/1897" title="1897">1897</a>-<a href="/wiki/1904" title="1904">1904</a>)</figcaption></figure> <p>L'<b>uovo</b> è la <a href="/wiki/Cellula_gametica" title="Cellula gametica">cellula gametica</a>, o sessuale, femminile degli <a href="/wiki/Animali" class="mw-redirect" title="Animali">animali</a> che si riproducono per via sessuata. Contiene un corredo cromosomico aploide. Contiene nel suo <a href="/wiki/Citoplasma" title="Citoplasma">citoplasma</a> le sostanze nutritive, <a href="/wiki/RNA_messaggeri" class="mw-redirect" title="RNA messaggeri">RNA messaggeri</a> e <a href="/wiki/RNA_transfer" title="RNA transfer">RNA transfer</a> necessari per il primo sostentamento e la prima sintesi proteica dell'<a href="/wiki/Embrione" title="Embrione">embrione</a>. Per essere fecondato, un uovo deve quasi sempre congiungersi con il gamete maschile (<a href="/wiki/Spermatozoo" title="Spermatozoo">spermatozoo</a>). </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Struttura_generale_della_cellula_uovo">Struttura generale della cellula uovo</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Uovo_(biologia)&veaction=edit&section=1" title="Modifica la sezione Struttura generale della cellula uovo" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Uovo_(biologia)&action=edit&section=1" title="Edit section's source code: Struttura generale della cellula uovo"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>L'uovo si forma nelle <a href="/wiki/Gonadi" title="Gonadi">gonadi</a> femminili tramite un processo detto <a href="/wiki/Ovogenesi" title="Ovogenesi">ovogenesi</a>, ma può acquisire lungo le vie genitali dell'apparato riproduttore femminile ulteriori strutture di rivestimento funzionali alla <a href="/wiki/Fecondazione" title="Fecondazione">fecondazione</a> e allo sviluppo dell'<a href="/wiki/Embrione" title="Embrione">embrione</a>. Le dimensioni sono variabili, tuttavia è generalmente la più grande cellula presente nell'organismo femminile. La cellula uovo è circondata dalla <a href="/wiki/Membrana_plasmatica" class="mw-redirect" title="Membrana plasmatica">membrana plasmatica</a> come ogni altra cellula, ma presenta un'ulteriore barriera protettiva: l'involucro vitellino, struttura fondamentale nel processo di fecondazione. Il citoplasma può essere più o meno ricco di <a href="/wiki/Tuorlo" title="Tuorlo">tuorlo</a> (o <i>vitellium</i>), una sostanza ricca di vitellogenina (prodotta dal fegato della madre) che costituisce un'importante fonte di nutrimento per l'embrione. In base alla quantità di tuorlo presente e in base alla sua posizione nella cellula vengono classificati diversi tipi di uova. </p><p>Classificazione in base alla quantità di tuorlo: </p> <ul><li><b>alecitiche</b>, prive di tuorlo;</li> <li><b>oligolecitiche</b>, con una piccola quantità di tuorlo;</li> <li><b>mesolecitiche</b>, con una discreta quantità di tuorlo;</li> <li><b>macrolecitiche</b>, con un'enorme quantità di tuorlo.</li></ul> <p>Classificazione in base alla disposizione del tuorlo: </p> <ul><li><b>isolecitiche</b>, se il tuorlo è disposto uniformemente nel citoplasma;</li> <li><b>telolecitiche</b>, se il tuorlo sposta il citoplasma attivo e il nucleo ad un polo della cellula; si creano allora un polo animale (citoplasma e nucleo) e un polo vitellino (tuorlo);</li> <li><b>centrolecitiche</b>, se il tuorlo si dispone attorno al nucleo e il citoplasma attivo è spostato in periferia.</li></ul> <p>Oltre all'involucro vitellino la cellula uovo può essere circondata da ulteriori involucri e strutture con funzioni differenti. Tali strutture hanno origine nelle vie genitali e non nell'ovario. Vengono pertanto definite "involucri secondari"; solo l'involucro vitellino viene depositato a livello dell'ovario e prende il nome di "involucro primario". </p> <div class="mw-heading mw-heading2"><h2 id="Morfologia_comparata_della_cellula_uovo">Morfologia comparata della cellula uovo</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Uovo_(biologia)&veaction=edit&section=2" title="Modifica la sezione Morfologia comparata della cellula uovo" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Uovo_(biologia)&action=edit&section=2" title="Edit section's source code: Morfologia comparata della cellula uovo"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="Vertebrati">Vertebrati</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Uovo_(biologia)&veaction=edit&section=3" title="Modifica la sezione Vertebrati" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Uovo_(biologia)&action=edit&section=3" title="Edit section's source code: Vertebrati"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Salmoneggskils.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/0/08/Salmoneggskils.jpg/220px-Salmoneggskils.jpg" decoding="async" width="220" height="155" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/0/08/Salmoneggskils.jpg/330px-Salmoneggskils.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/0/08/Salmoneggskils.jpg/440px-Salmoneggskils.jpg 2x" data-file-width="1860" data-file-height="1308" /></a><figcaption>Uova di <a href="/wiki/Salmo_salar" title="Salmo salar">salmone</a> in diversi stadi di crescita</figcaption></figure> <div class="mw-heading mw-heading4"><h4 id="Pesci">Pesci</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Uovo_(biologia)&veaction=edit&section=4" title="Modifica la sezione Pesci" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Uovo_(biologia)&action=edit&section=4" title="Edit section's source code: Pesci"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Nei <a href="/wiki/Pesci" class="mw-redirect" title="Pesci">pesci</a> l'uovo è unicamente una sfera di sostanze nutritive, un <a href="/wiki/Tuorlo" title="Tuorlo">tuorlo</a>. </p> <div class="mw-heading mw-heading4"><h4 id="Anfibi">Anfibi</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Uovo_(biologia)&veaction=edit&section=5" title="Modifica la sezione Anfibi" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Uovo_(biologia)&action=edit&section=5" title="Edit section's source code: Anfibi"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Le uova degli <a href="/wiki/Amphibia" title="Amphibia">anfibi</a> sono definite mesolecitiche, ovvero sono provviste di una media quantità di vitellium. Esternamente la membrana plasmatica è circondata dall'involucro vitellino e da uno spesso strato gelatinoso (involucro secondario) che conferisce protezione alla cellula. </p><p>L'uovo degli anfibi è caratterizzato dalla presenza di un polo animale (in alto) ed un polo vegetativo (in basso). Il primo è ricco di molecole di RNA (messaggero e transfer) che svolgeranno la sintesi proteica non appena avvenuta la fecondazione. Il secondo costituisce il maggior accumulo di vitellogenina e sostanze nutritizie. Superficialmente il citoplasma corticale, ovvero quello subito sotto alla membrana plasmatica, è caratterizzato da un pigmento che si distribuisce in modo diverso tra i due poli: risulta più concentrato nella porzione animale e meno concentrato nella porzione vegetativa. </p> <div class="mw-heading mw-heading4"><h4 id="Rettili">Rettili</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Uovo_(biologia)&veaction=edit&section=6" title="Modifica la sezione Rettili" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Uovo_(biologia)&action=edit&section=6" title="Edit section's source code: Rettili"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>L'uovo dei <a href="/wiki/Reptilia" title="Reptilia">rettili</a> si sviluppa in ambiente terrestre e non acquatico, pertanto necessita di specifiche strutture adibite all'accrescimento dell'embrione in condizioni "più ostili" rispetto a quelle acquatiche. La membrana plasmatica è circondata dall'involucro vitellino (involucro primario). Sono inoltre presenti numerose strutture secondarie: </p> <ul><li>le <a href="/wiki/Calaza" title="Calaza">calaze</a>, strutture proteiche che tengono il tuorlo in posizione centrale e avvolgono la cellula con un'ulteriore membrana;</li> <li>l'<a href="/wiki/Albume" title="Albume">albume</a>, che costituisce un'importante fonte di acqua e svolge una funzione battericida;</li> <li>le membrane testacee sia interne sia esterne le quali, verso il fondo ottuso del guscio, si allargano formando una <a href="/wiki/Bolla_(fisica)" title="Bolla (fisica)">bolla</a> d'aria;</li> <li>il guscio, che rappresenta una protezione meccanica, una protezione dall'essiccamento, una superficie permeabile all'aria per consentire gli scambi respiratori e un'importante riserva di calcio.</li></ul> <p>Durante lo sviluppo l'embrione sviluppa strutture definite "annessi embrionali". Ne fanno parte: </p> <ul><li>il <a href="/wiki/Amnios" title="Amnios">sacco amniotico</a>, utile per mantenere l'embrione in ambiente umido. Al suo interno è contenuto il liquido amniotico;</li> <li>il <a href="/wiki/Sacco_vitellino" title="Sacco vitellino">sacco vitellino</a>, che contiene il vitellium già presente in origine nella cellula uovo e costituisce la primaria fonte di sostanze nutritizie;</li> <li>l'<a href="/wiki/Allantoide" title="Allantoide">allantoide</a>, ovvero un sacchetto in contatto sia con l'embrione sia con il <a href="/wiki/Corion" title="Corion">corion</a>, che svolge tre funzioni: consentire la respirazione attraverso il guscio, raccogliere i prodotti del catabolismo, assorbire dal guscio i sali di calcio necessari allo sviluppo dell'embrione.</li></ul> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Egg_in_straw_nest.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/3/3e/Egg_in_straw_nest.jpg/220px-Egg_in_straw_nest.jpg" decoding="async" width="220" height="152" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/3e/Egg_in_straw_nest.jpg/330px-Egg_in_straw_nest.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/3e/Egg_in_straw_nest.jpg/440px-Egg_in_straw_nest.jpg 2x" data-file-width="1600" data-file-height="1104" /></a><figcaption>Uova di uccello nel nido</figcaption></figure> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Schleiden-vogel.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/7/7d/Schleiden-vogel.jpg/220px-Schleiden-vogel.jpg" decoding="async" width="220" height="328" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/7d/Schleiden-vogel.jpg/330px-Schleiden-vogel.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/7d/Schleiden-vogel.jpg/440px-Schleiden-vogel.jpg 2x" data-file-width="628" data-file-height="936" /></a><figcaption>Sviluppo di un uccello nell'uovo<br /> (da <i>Das Meer</i> di <a href="/wiki/Matthias_Jacob_Schleiden" title="Matthias Jacob Schleiden">Matthias Jacob Schleiden</a>, 1867)</figcaption></figure> <div class="mw-heading mw-heading4"><h4 id="Uccelli">Uccelli</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Uovo_(biologia)&veaction=edit&section=7" title="Modifica la sezione Uccelli" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Uovo_(biologia)&action=edit&section=7" title="Edit section's source code: Uccelli"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>L'uovo degli <a href="/wiki/Aves" title="Aves">uccelli</a> è assai simile a quello dei rettili. </p><p>Dopo la fecondazione, i tempi di incubazione per arrivare alla schiusa sono variabili: 3 settimane per la <a href="/wiki/Gallina" class="mw-redirect" title="Gallina">gallina</a>, 4 settimane per il <a href="/wiki/Tacchino" class="mw-redirect" title="Tacchino">tacchino</a>, 6 settimane per lo <a href="/wiki/Struzzo" class="mw-redirect" title="Struzzo">struzzo</a> (ha un uovo che pesa dai 800 ai 1500 g<b>)</b> </p> <div class="mw-heading mw-heading4"><h4 id="Mammiferi">Mammiferi</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Uovo_(biologia)&veaction=edit&section=8" title="Modifica la sezione Mammiferi" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Uovo_(biologia)&action=edit&section=8" title="Edit section's source code: Mammiferi"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>I mammiferi <a href="/wiki/Monotremi" class="mw-redirect" title="Monotremi">monotremi</a> (<a href="/wiki/Ornithorhynchus_anatinus" title="Ornithorhynchus anatinus">ornitorinco</a>, <a href="/wiki/Tachiglossidi" class="mw-redirect" title="Tachiglossidi">echidna</a>) depongono uova da rettile; negli altri <a href="/wiki/Ordine_(tassonomia)" title="Ordine (tassonomia)">ordini</a> l'<a href="/wiki/Ovulo_(gamete)" title="Ovulo (gamete)">ovulo</a> è ridotto alle dimensioni di una cellula; lo sviluppo embrionale umano di conseguenza è lo stesso di qualunque altro <a href="/wiki/Placentati" class="mw-redirect" title="Placentati">mammifero placentato</a>. </p> <div class="mw-heading mw-heading2"><h2 id="Bibliografia">Bibliografia</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Uovo_(biologia)&veaction=edit&section=9" title="Modifica la sezione Bibliografia" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Uovo_(biologia)&action=edit&section=9" title="Edit section's source code: Bibliografia"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li>Paola Erba, "Piccolo, grande uovo", su <i>Focus</i>, 174 (aprile 2007), pp. 44-52.</li> <li>Albert Le Moigne e Jean Foucrier, <i>Biologia dello sviluppo</i> (ed. it. a cura di Piero Andreuccetti, Chiara Campanella e Rosalba Putti), Napoli, Edises, 2004. <a href="/wiki/Speciale:RicercaISBN/8879592971" class="internal mw-magiclink-isbn">ISBN 88-7959-297-1</a>.</li></ul> <div class="mw-heading mw-heading2"><h2 id="Voci_correlate">Voci correlate</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Uovo_(biologia)&veaction=edit&section=10" title="Modifica la sezione Voci correlate" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Uovo_(biologia)&action=edit&section=10" title="Edit section's source code: Voci correlate"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Ovulo_(gamete)" title="Ovulo (gamete)">Ovulo (gamete)</a></li> <li><a href="/wiki/Uovo_(alimento)" title="Uovo (alimento)">Uovo (alimento)</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Altri_progetti">Altri progetti</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Uovo_(biologia)&veaction=edit&section=11" title="Modifica la sezione Altri progetti" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Uovo_(biologia)&action=edit&section=11" title="Edit section's source code: Altri progetti"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <div id="interProject" class="toccolours" style="display: none; clear: both; margin-top: 2em"><p id="sisterProjects" style="background-color: #efefef; color: black; font-weight: bold; margin: 0"><span>Altri progetti</span></p><ul title="Collegamenti verso gli altri progetti Wikimedia"> <li class="" title=""><a href="https://it.wikiquote.org/wiki/Uovo" class="extiw" title="q:Uovo">Wikiquote</a></li> <li class="" title=""><a href="https://it.wikibooks.org/wiki/Categoria:Uova" class="extiw" title="b:Categoria:Uova">Wikibooks</a></li> <li class="" title=""><a href="https://it.wiktionary.org/wiki/uovo" class="extiw" title="wikt:uovo">Wikizionario</a></li> <li class="" title=""><span class="plainlinks" title="commons:Category:Eggs"><a class="external text" href="https://commons.wikimedia.org/wiki/Category:Eggs?uselang=it">Wikimedia Commons</a></span></li></ul></div> <ul><li><span typeof="mw:File"><a href="https://it.wikiquote.org/wiki/" title="Collabora a Wikiquote"><img alt="Collabora a Wikiquote" src="//upload.wikimedia.org/wikipedia/commons/thumb/f/fa/Wikiquote-logo.svg/18px-Wikiquote-logo.svg.png" decoding="async" width="18" height="21" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/fa/Wikiquote-logo.svg/27px-Wikiquote-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/f/fa/Wikiquote-logo.svg/36px-Wikiquote-logo.svg.png 2x" data-file-width="300" data-file-height="355" /></a></span> <a href="https://it.wikiquote.org/wiki/" class="extiw" title="q:">Wikiquote</a> contiene citazioni sull'<b><a href="https://it.wikiquote.org/wiki/Uovo" class="extiw" title="q:Uovo">uovo</a></b></li> <li><span typeof="mw:File"><a href="https://it.wikibooks.org/wiki/" title="Collabora a Wikibooks"><img alt="Collabora a Wikibooks" src="//upload.wikimedia.org/wikipedia/commons/thumb/f/fa/Wikibooks-logo.svg/18px-Wikibooks-logo.svg.png" decoding="async" width="18" height="18" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/fa/Wikibooks-logo.svg/27px-Wikibooks-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/f/fa/Wikibooks-logo.svg/36px-Wikibooks-logo.svg.png 2x" data-file-width="300" data-file-height="300" /></a></span> <a href="https://it.wikibooks.org/wiki/" class="extiw" title="b:">Wikibooks</a> contiene testi o manuali sull'<b><a href="https://it.wikibooks.org/wiki/Categoria:Uova" class="extiw" title="b:Categoria:Uova">uovo</a></b></li> <li><span typeof="mw:File"><a href="https://it.wiktionary.org/wiki/" title="Collabora a Wikizionario"><img alt="Collabora a Wikizionario" src="//upload.wikimedia.org/wikipedia/commons/thumb/f/f9/Wiktionary_small.svg/18px-Wiktionary_small.svg.png" decoding="async" width="18" height="18" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/f9/Wiktionary_small.svg/27px-Wiktionary_small.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/f/f9/Wiktionary_small.svg/36px-Wiktionary_small.svg.png 2x" data-file-width="350" data-file-height="350" /></a></span> <a href="https://it.wiktionary.org/wiki/" class="extiw" title="wikt:">Wikizionario</a> contiene il lemma di dizionario «<b><a href="https://it.wiktionary.org/wiki/uovo" class="extiw" title="wikt:uovo">uovo</a></b>»</li> <li><span typeof="mw:File"><a href="https://commons.wikimedia.org/wiki/?uselang=it" title="Collabora a Wikimedia Commons"><img alt="Collabora a Wikimedia Commons" src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/18px-Commons-logo.svg.png" decoding="async" width="18" height="24" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/27px-Commons-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/36px-Commons-logo.svg.png 2x" data-file-width="1024" data-file-height="1376" /></a></span> <span class="plainlinks"><a class="external text" href="https://commons.wikimedia.org/wiki/?uselang=it">Wikimedia Commons</a></span> contiene immagini o altri file sull'<b><span class="plainlinks"><a class="external text" href="https://commons.wikimedia.org/wiki/Category:Eggs?uselang=it">uovo</a></span></b></li></ul> <style data-mw-deduplicate="TemplateStyles:r141815314">.mw-parser-output .navbox{border:1px solid #aaa;clear:both;margin:auto;padding:2px;width:100%}.mw-parser-output .navbox th{padding-left:1em;padding-right:1em;text-align:center}.mw-parser-output .navbox>tbody>tr:first-child>th{background:#ccf;font-size:90%;width:100%;color:var(--color-base,black)}.mw-parser-output .navbox_navbar{float:left;margin:0;padding:0 10px 0 0;text-align:left;width:6em}.mw-parser-output .navbox_title{font-size:110%}.mw-parser-output .navbox_abovebelow{background:#ddf;font-size:90%;font-weight:normal}.mw-parser-output .navbox_group{background:#ddf;font-size:90%;padding:0 10px;white-space:nowrap}.mw-parser-output .navbox_list{font-size:90%;width:100%}.mw-parser-output .navbox_list a{white-space:nowrap}html:not(.vector-feature-night-mode-enabled) .mw-parser-output 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mw-collapsible mw-collapsed noprint metadata" id="navbox-Riproduzione"><tbody><tr><th colspan="2"><div class="navbox_navbar"><div class="noprint plainlinks" style="background-color:transparent; padding:0; font-size:xx-small; color:var(--color-base, #000000); white-space:nowrap;"><a href="/wiki/Template:Riproduzione" title="Template:Riproduzione"><span title="Vai alla pagina del template">V</span></a> · <a href="/w/index.php?title=Discussioni_template:Riproduzione&action=edit&redlink=1" class="new" title="Discussioni template:Riproduzione (la pagina non esiste)"><span title="Discuti del template">D</span></a> · <a class="external text" href="https://it.wikipedia.org/w/index.php?title=Template:Riproduzione&action=edit"><span title="Modifica il template. Usa l'anteprima prima di salvare">M</span></a></div></div><span class="navbox_title"><a href="/wiki/Riproduzione" title="Riproduzione">Riproduzione</a>, <a href="/wiki/Ontogenesi" title="Ontogenesi">sviluppo</a> e <a href="/wiki/Ciclo_vitale_biologico" title="Ciclo vitale biologico">cicli vitali</a></span></th></tr><tr><th colspan="1" class="navbox_group" style="text-align:left">Cellule<br />germinali</th><td colspan="1" class="navbox_list navbox_odd"><table class="subnavbox"><tbody><tr><th class="subnavbox_group"><a href="/wiki/Spora" title="Spora">Spore</a></th><td colspan="1"><a href="/wiki/Sporogenesi" title="Sporogenesi">Sporogenesi</a><b> ·</b> <a href="/wiki/Mitospora" title="Mitospora">Mitospora</a> (<small><a href="/w/index.php?title=Zoospora&action=edit&redlink=1" class="new" title="Zoospora (la pagina non esiste)">Zoospora</a><b> ·</b> <a href="/w/index.php?title=Aplanospora&action=edit&redlink=1" class="new" title="Aplanospora (la pagina non esiste)">Aplanospora</a></small>)<b> ·</b> <a href="/wiki/Meiospora" title="Meiospora">Meiospora</a> (<small><a href="/wiki/Isosporia" title="Isosporia">Isosporia</a><b> ·</b> <a href="/wiki/Eterosporia" title="Eterosporia">Eterosporia</a></small>)<b> ·</b> <a href="/w/index.php?title=Sporocisti&action=edit&redlink=1" class="new" title="Sporocisti (la pagina non esiste)">Sporocisti</a><b> ·</b> <a href="/wiki/Sporangio" title="Sporangio">Sporangio</a></td></tr><tr><th class="subnavbox_group"><a href="/wiki/Gamete" class="mw-redirect" title="Gamete">Gameti</a></th><td colspan="1"><a href="/wiki/Gametogenesi" title="Gametogenesi">Gametogenesi</a> (<small><a href="/wiki/Ovogenesi" title="Ovogenesi">Ovogenesi</a><b> ·</b> <a href="/wiki/Spermatogenesi" title="Spermatogenesi">Spermatogenesi</a></small>)<b> ·</b> <a href="/wiki/Isogamia" title="Isogamia">Isogami</a><b> ·</b> <a href="/wiki/Oogamia" title="Oogamia">Oogami</a> (<small><a href="/wiki/Oosfera" title="Oosfera">Oosfera</a><b> ·</b> <a href="/wiki/Ovulo_(gamete)" title="Ovulo (gamete)">Ovulo</a><b> ·</b> <a href="/w/index.php?title=Spermazio&action=edit&redlink=1" class="new" title="Spermazio (la pagina non esiste)">Spermazio</a><b> ·</b> <a href="/wiki/Spermatozoo" title="Spermatozoo">Spermatozoo</a></small>)<b> ·</b> <a href="/w/index.php?title=Gametocisti&action=edit&redlink=1" class="new" title="Gametocisti (la pagina non esiste)">Gametocisti</a><b> ·</b> <a href="/wiki/Gametangio" title="Gametangio">Gametangio</a></td></tr></tbody></table></td></tr><tr><th colspan="1" class="navbox_group" style="text-align:left"><a href="/wiki/Riproduzione_asessuata" title="Riproduzione asessuata">Riproduzione<br />asessuata</a></th><td colspan="1" class="navbox_list navbox_even"><table class="subnavbox"><tbody><tr><th class="subnavbox_group">Basi</th><td colspan="1"><a href="/wiki/Mitosi" title="Mitosi">Mitosi</a><b> ·</b> <a href="/wiki/Clonazione" title="Clonazione">Clonazione</a></td></tr><tr><th class="subnavbox_group">Meccanismi</th><td colspan="1"><a href="/wiki/Scissione_(biologia)" title="Scissione (biologia)">Scissione</a><b> ·</b> <a href="/wiki/Gemmazione" title="Gemmazione">Gemmazione</a><b> ·</b> <a href="/wiki/Frammentazione_(riproduzione)" title="Frammentazione (riproduzione)">Frammentazione</a> (<small><a href="/wiki/Ormogonio" title="Ormogonio">Ormogonio</a><b> ·</b> <a href="/wiki/Sclerozio" title="Sclerozio">Sclerozio</a><b> ·</b> <a href="/wiki/Propagulo" title="Propagulo">Propagulo</a></small>)<b> ·</b> <a href="/wiki/Sporulazione" title="Sporulazione">Sporulazione</a><b> ·</b> <a href="/wiki/Sporogonia" title="Sporogonia">Sporogonia</a><b> ·</b> <a href="/wiki/Poliembrionia" title="Poliembrionia">Poliembrionia</a><b> ·</b> <a href="/wiki/Amplificazione_larvale" title="Amplificazione larvale">Amplificazione larvale</a></td></tr></tbody></table></td></tr><tr><th colspan="1" class="navbox_group" style="text-align:left"><a href="/wiki/Riproduzione_sessuata" title="Riproduzione sessuata">Riproduzione<br />sessuata</a></th><td colspan="1" class="navbox_list navbox_odd"><table class="subnavbox"><tbody><tr><th class="subnavbox_group">Basi</th><td colspan="1"><a href="/wiki/Meiosi" title="Meiosi">Meiosi</a><b> ·</b> <a href="/wiki/Aploidia" title="Aploidia">Aplofase</a><b> ·</b> <a href="/wiki/Fecondazione" title="Fecondazione">Singamia</a> (<small><a href="/wiki/Plasmogamia" title="Plasmogamia">Plasmogamia</a><b> ·</b> <a href="/wiki/Dicariofase" title="Dicariofase">Dicariofase</a><b> ·</b> <a href="/wiki/Cariogamia" title="Cariogamia">Cariogamia</a></small>)<b> ·</b> <a href="/wiki/Fecondazione_interna" class="mw-redirect" title="Fecondazione interna">Fecondazione interna</a><b> ·</b> <a href="/wiki/Fecondazione_esterna" class="mw-redirect" title="Fecondazione esterna">Fecondazione esterna</a><b> ·</b> <a href="/wiki/Diploidia" title="Diploidia">Diplofase</a><b> ·</b> <a href="/wiki/Ermafroditismo" title="Ermafroditismo">Monoicismo</a><b> ·</b> <a href="/wiki/Dioico" class="mw-redirect" title="Dioico">Dioicismo</a> (<small><a href="/wiki/Maschio" title="Maschio">Maschio</a><b> ·</b> <a href="/wiki/Femmina" title="Femmina">Femmina</a></small>)</td></tr><tr><th class="subnavbox_group">Meccanismi</th><td colspan="1"><a href="/wiki/Ologamia" title="Ologamia">Ologamia</a><b> ·</b> <a href="/wiki/Gametangiogamia" title="Gametangiogamia">Gametangiogamia</a><b> ·</b> <a href="/wiki/Somatogamia" title="Somatogamia">Somatogamia</a><b> ·</b> <a href="/wiki/Gametogamia" title="Gametogamia">Gametogamia</a><b> ·</b> <a href="/wiki/Partenogenesi" title="Partenogenesi">Partenogenesi</a><b> ·</b> <a href="/wiki/Ginogenesi" title="Ginogenesi">Ginogenesi</a><b> ·</b> <a href="/wiki/Ibridogenesi" title="Ibridogenesi">Ibridogenesi</a></td></tr></tbody></table></td></tr><tr><th colspan="1" class="navbox_group" style="text-align:left"><a href="/wiki/Ontogenesi" title="Ontogenesi">Ontogenesi</a></th><td colspan="1" class="navbox_list navbox_even"><a href="/wiki/Seme" title="Seme">Seme</a><b> ·</b> <a href="/wiki/Sporofito" title="Sporofito">Sporofito</a><b> ·</b> <a href="/wiki/Gametofito" title="Gametofito">Gametofito</a><b> ·</b> <a href="/wiki/Zigote" title="Zigote">Zigote</a><b> ·</b> <a href="/wiki/Embrione" title="Embrione">Embrione</a><b> ·</b> <a class="mw-selflink selflink">Uovo</a><b> ·</b> <a href="/wiki/Larva" title="Larva">Larva</a><b> ·</b> <a href="/wiki/Neanide" title="Neanide">Neanide</a><b> ·</b> <a href="/wiki/Ninfa_(zoologia)" title="Ninfa (zoologia)">Ninfa</a><b> ·</b> <a href="/wiki/Pupa" title="Pupa">Pupa</a><b> ·</b> <a href="/wiki/Feto" title="Feto">Feto</a><b> ·</b> <a href="/wiki/Neonato" title="Neonato">Neonato</a><b> ·</b> <a href="/w/index.php?title=Sviluppo_diretto&action=edit&redlink=1" class="new" title="Sviluppo diretto (la pagina non esiste)">Sviluppo diretto</a><b> ·</b> <a 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