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Fibrocellula - Wikipedia

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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" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Struttura"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Struttura</span> </div> </a> <ul id="toc-Struttura-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Meccanismo_della_contrazione_delle_fibrocellule" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Meccanismo_della_contrazione_delle_fibrocellule"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Meccanismo della contrazione delle fibrocellule</span> </div> </a> <ul id="toc-Meccanismo_della_contrazione_delle_fibrocellule-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Reclutamento" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Reclutamento"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Reclutamento</span> </div> </a> <ul id="toc-Reclutamento-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Note" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Note"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Note</span> </div> </a> <ul id="toc-Note-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">5</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">6</span> <span>Altri progetti</span> </div> </a> <ul id="toc-Altri_progetti-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Collegamenti_esterni" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Collegamenti_esterni"> <div class="vector-toc-text"> <span class="vector-toc-numb">7</span> <span>Collegamenti esterni</span> </div> </a> <ul id="toc-Collegamenti_esterni-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 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<h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Fibrocellula</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&#039;altra lingua. Disponibile in 42 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-42" 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">42 lingue</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%AE%D9%84%D9%8A%D8%A9_%D8%B9%D8%B6%D9%84%D9%8A%D8%A9" title="خلية عضلية - arabo" lang="ar" hreflang="ar" data-title="خلية عضلية" data-language-autonym="العربية" data-language-local-name="arabo" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-ast mw-list-item"><a href="https://ast.wikipedia.org/wiki/Fibra_muscular" title="Fibra muscular - asturiano" lang="ast" hreflang="ast" data-title="Fibra muscular" data-language-autonym="Asturianu" data-language-local-name="asturiano" class="interlanguage-link-target"><span>Asturianu</span></a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%AA%E0%A7%87%E0%A6%B6%E0%A7%80%E0%A6%95%E0%A7%8B%E0%A6%B7" title="পেশীকোষ - bengalese" lang="bn" hreflang="bn" data-title="পেশীকোষ" data-language-autonym="বাংলা" data-language-local-name="bengalese" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/Miocit" title="Miocit - bosniaco" lang="bs" hreflang="bs" data-title="Miocit" 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/Fibra_muscular" title="Fibra muscular - catalano" lang="ca" hreflang="ca" data-title="Fibra muscular" 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/%D9%85%D8%A7%D8%B3%D9%88%D9%88%D9%84%DA%A9%DB%95%DA%95%DB%8C%D8%B4%D8%A7%DA%B5" title="ماسوولکەڕیشاڵ - curdo centrale" lang="ckb" hreflang="ckb" data-title="ماسوولکەڕیشاڵ" 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/Myocyt" title="Myocyt - ceco" lang="cs" hreflang="cs" data-title="Myocyt" data-language-autonym="Čeština" data-language-local-name="ceco" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Muskelfaser" title="Muskelfaser - tedesco" lang="de" hreflang="de" data-title="Muskelfaser" 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%9C%CF%85%CF%8A%CE%BA%CF%8C_%CE%BA%CF%8D%CF%84%CF%84%CE%B1%CF%81%CE%BF" title="Μυϊκό κύτταρο - greco" lang="el" hreflang="el" data-title="Μυϊκό κύτταρο" data-language-autonym="Ελληνικά" data-language-local-name="greco" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Muscle_cell" title="Muscle cell - inglese" lang="en" hreflang="en" data-title="Muscle cell" 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/Muskol%C4%89elo" title="Muskolĉelo - esperanto" lang="eo" hreflang="eo" data-title="Muskolĉelo" 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/Fibra_muscular" title="Fibra muscular - spagnolo" lang="es" hreflang="es" data-title="Fibra muscular" data-language-autonym="Español" data-language-local-name="spagnolo" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Muskulu-zuntz" title="Muskulu-zuntz - basco" lang="eu" hreflang="eu" data-title="Muskulu-zuntz" 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%B3%D9%84%D9%88%D9%84_%D9%85%D8%A7%D9%87%DB%8C%DA%86%D9%87%E2%80%8C%D8%A7%DB%8C" title="سلول ماهیچه‌ای - persiano" lang="fa" hreflang="fa" data-title="سلول ماهیچه‌ای" 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/Lihassolu" title="Lihassolu - finlandese" lang="fi" hreflang="fi" data-title="Lihassolu" data-language-autonym="Suomi" data-language-local-name="finlandese" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Myocyte" title="Myocyte - francese" lang="fr" hreflang="fr" data-title="Myocyte" data-language-autonym="Français" data-language-local-name="francese" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Miocito" title="Miocito - galiziano" lang="gl" hreflang="gl" data-title="Miocito" data-language-autonym="Galego" data-language-local-name="galiziano" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Miocit" title="Miocit - croato" lang="hr" hreflang="hr" data-title="Miocit" data-language-autonym="Hrvatski" data-language-local-name="croato" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/Izomsejt" title="Izomsejt - ungherese" lang="hu" hreflang="hu" data-title="Izomsejt" 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%84%D5%AB%D5%B8%D6%81%D5%AB%D5%BF%D5%B6%D5%A5%D6%80" title="Միոցիտներ - armeno" lang="hy" hreflang="hy" data-title="Միոցիտներ" 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/Sel_otot" title="Sel otot - indonesiano" lang="id" hreflang="id" data-title="Sel otot" 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-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E7%AD%8B%E7%B4%B0%E8%83%9E" title="筋細胞 - giapponese" lang="ja" hreflang="ja" data-title="筋細胞" 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-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EA%B7%BC%EC%9C%A1%EC%84%B8%ED%8F%AC" title="근육세포 - coreano" lang="ko" hreflang="ko" data-title="근육세포" data-language-autonym="한국어" data-language-local-name="coreano" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-la mw-list-item"><a href="https://la.wikipedia.org/wiki/Myocytus" title="Myocytus - latino" lang="la" hreflang="la" data-title="Myocytus" data-language-autonym="Latina" data-language-local-name="latino" class="interlanguage-link-target"><span>Latina</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Sel_otot" title="Sel otot - malese" lang="ms" hreflang="ms" data-title="Sel otot" 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-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Spiercel" title="Spiercel - olandese" lang="nl" hreflang="nl" data-title="Spiercel" data-language-autonym="Nederlands" data-language-local-name="olandese" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-oc mw-list-item"><a href="https://oc.wikipedia.org/wiki/Miocit" title="Miocit - occitano" lang="oc" hreflang="oc" data-title="Miocit" data-language-autonym="Occitan" data-language-local-name="occitano" class="interlanguage-link-target"><span>Occitan</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Miocyt" title="Miocyt - polacco" lang="pl" hreflang="pl" data-title="Miocyt" data-language-autonym="Polski" data-language-local-name="polacco" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Fibra_muscular" title="Fibra muscular - portoghese" lang="pt" hreflang="pt" data-title="Fibra muscular" data-language-autonym="Português" data-language-local-name="portoghese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Miocit" title="Miocit - rumeno" lang="ro" hreflang="ro" data-title="Miocit" data-language-autonym="Română" data-language-local-name="rumeno" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%9C%D0%B8%D0%BE%D1%86%D0%B8%D1%82%D1%8B" title="Миоциты - russo" lang="ru" hreflang="ru" data-title="Миоциты" data-language-autonym="Русский" data-language-local-name="russo" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Myocyte" title="Myocyte - Simple English" lang="en-simple" hreflang="en-simple" data-title="Myocyte" 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/Myocyt" title="Myocyt - slovacco" lang="sk" hreflang="sk" data-title="Myocyt" 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/Mi%C5%A1i%C4%8Dna_celica" title="Mišična celica - sloveno" lang="sl" hreflang="sl" data-title="Mišična celica" data-language-autonym="Slovenščina" data-language-local-name="sloveno" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/Miocit" title="Miocit - serbo" lang="sr" hreflang="sr" data-title="Miocit" 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-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Muskelcell" title="Muskelcell - svedese" lang="sv" hreflang="sv" data-title="Muskelcell" data-language-autonym="Svenska" data-language-local-name="svedese" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Kas_h%C3%BCcresi" title="Kas hücresi - turco" lang="tr" hreflang="tr" data-title="Kas hücresi" data-language-autonym="Türkçe" data-language-local-name="turco" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%9C%D1%96%D0%BE%D1%86%D0%B8%D1%82" title="Міоцит - ucraino" lang="uk" hreflang="uk" data-title="Міоцит" 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%B9%D8%B6%D9%84%D8%A7%D8%AA%DB%8C_%D8%AE%D9%84%DB%8C%DB%81" title="عضلاتی خلیہ - urdu" lang="ur" hreflang="ur" data-title="عضلاتی خلیہ" data-language-autonym="اردو" data-language-local-name="urdu" class="interlanguage-link-target"><span>اردو</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/T%E1%BA%BF_b%C3%A0o_c%C6%A1" title="Tế bào cơ - vietnamita" lang="vi" hreflang="vi" data-title="Tế bào cơ" 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-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E8%82%8C%E7%B4%B0%E8%83%9E" title="肌細胞 - cinese" lang="zh" hreflang="zh" data-title="肌細胞" 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-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/%E8%82%8C%E8%82%89%E7%B4%B0%E8%83%9E" title="肌肉細胞 - cantonese" lang="yue" hreflang="yue" data-title="肌肉細胞" data-language-autonym="粵語" data-language-local-name="cantonese" class="interlanguage-link-target"><span>粵語</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q428914#sitelinks-wikipedia" title="Modifica collegamenti interlinguistici" class="wbc-editpage">Modifica collegamenti</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> 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Segui i suggerimenti del <a href="/wiki/Progetto:Biologia" title="Progetto:Biologia">progetto di riferimento</a>.</div> </div> </div> </div> </div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:FIBROCELLULA.JPG" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/1/1b/FIBROCELLULA.JPG/310px-FIBROCELLULA.JPG" decoding="async" width="310" height="158" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/1/1b/FIBROCELLULA.JPG/465px-FIBROCELLULA.JPG 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/1/1b/FIBROCELLULA.JPG/620px-FIBROCELLULA.JPG 2x" data-file-width="989" data-file-height="503" /></a><figcaption>Schema della Fibrocellula</figcaption></figure> <p>La <b>fibrocellula</b> (anche chiamata <b>fibra muscolare</b>, <b>miocita</b> o <b>miocellula</b>) è l'elemento caratteristico del <a href="/wiki/Tessuto_muscolare" title="Tessuto muscolare">tessuto muscolare</a>, di forma allungata, fusiforme, in grado di accorciare la propria lunghezza in seguito ad uno <a href="/wiki/Stimolo" title="Stimolo">stimolo nervoso</a>. Il <a href="/wiki/Citoplasma" title="Citoplasma">citoplasma</a> della fibrocellula, detto <a href="/wiki/Sarcoplasma" class="mw-redirect" title="Sarcoplasma">sarcoplasma</a>, è occupato in gran parte dalle <a href="/wiki/Miofibrille" class="mw-redirect" title="Miofibrille">miofibrille</a> (o strutture fibrillari). </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Struttura">Struttura</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Fibrocellula&amp;veaction=edit&amp;section=1" title="Modifica la sezione Struttura" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Fibrocellula&amp;action=edit&amp;section=1" title="Edit section&#039;s source code: Struttura"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Le miofibrille sono chimicamente formate da filamenti di sostanze <a href="/wiki/Proteina" class="mw-redirect" title="Proteina">proteiche</a> (<a href="/wiki/Actina" title="Actina">actina</a> e <a href="/wiki/Miosina" title="Miosina">miosina</a>). </p><p>La disposizione intracellulare delle miofibrille determina il tipo di fibrocellula: liscia o striata. </p> <ul><li>All'interno della fibrocellula del <a href="/wiki/Tessuto_muscolare_striato" title="Tessuto muscolare striato">tessuto muscolare striato</a> è presente una striatura trasversale supplementare dovuta alla sovrapposizione in determinate zone dell'actina e della miosina. Le fibrocellule striate sono lunghe da 1 a 40 micron e generalmente sono polinucleate (<a href="/wiki/Sincizio" title="Sincizio">sincizio</a>), con i nuclei situati in posizione ipolemmale, di forma allungata e piuttosto basofili.</li> <li>All'interno della fibrocellula di tipo liscio le miofibrille hanno una disposizione semplice longitudinale. Nel <a href="/wiki/Tessuto_muscolare_liscio" title="Tessuto muscolare liscio">tessuto muscolare liscio</a> i miociti non sono raggruppati in sincizi, ma sono distinguibili singolarmente. Il nucleo presenta le stesse caratteristiche del tessuto precedente.</li> <li>Il <a href="/wiki/Tessuto_muscolare_cardiaco" class="mw-redirect" title="Tessuto muscolare cardiaco">tessuto muscolare cardiaco</a>, sebbene involontario, è striato, ma formato da cellule singole, chiamate <a href="/w/index.php?title=Cardiociti&amp;action=edit&amp;redlink=1" class="new" title="Cardiociti (la pagina non esiste)">cardiociti</a>, le quali possiedono a livello della membrana plasmatica delle giunzioni (g. scalariformi o dischi intercalari) che connettono le cellule tra di loro tramite <a href="/wiki/Desmosomi" class="mw-redirect" title="Desmosomi">desmosomi</a> e <a href="/wiki/Giunzioni_gap" class="mw-redirect" title="Giunzioni gap">giunzioni gap</a>. Il <a href="/wiki/Reticolo_sarcoplasmatico" title="Reticolo sarcoplasmatico">reticolo sarcoplasmatico</a> costituisce la diade.</li></ul> <p>Nella fibrocellula striata le miofibrille presentano un alternarsi di bande chiare o <i>bande I</i> (filamenti di actina) e di bande scure o <i>bande A</i> (filamenti di <a href="/wiki/Miosina" title="Miosina">miosina</a>) che conferiscono alla fibrocellula un aspetto appunto striato; paralleli alle miofibrille si trovano numerosi <a href="/wiki/Mitocondri" class="mw-redirect" title="Mitocondri">mitocondri</a> in file ordinate. Lo spazio residuo è occupato in gran parte dal reticolo sarcoplasmatico (versione specializzata del <a href="/wiki/Reticolo_endoplasmatico" title="Reticolo endoplasmatico">reticolo endoplasmatico</a>). Ogni banda I è divisa da una piccola banda Z o <i>linea Z</i>. La struttura filamentosa della miosina è più grossa di quella dell'actina (rispettivamente <a href="/wiki/Microfilamento" title="Microfilamento">microfilamenti</a> spessi e sottili). L'unità fondamentale della miofibrilla è il <a href="/wiki/Sarcomero" title="Sarcomero">sarcomero</a> cioè la parte compresa fra 2 linee Z. L'actina presente nelle miofibrille è costituita da 2 filamenti di "actina F" attorcigliati tra loro ed è associata ad altre 2 proteine: la <a href="/wiki/Tropomiosina" title="Tropomiosina">tropomiosina</a>, alloggiata nel solco tra i 2 filamenti di actina, e la <a href="/wiki/Troponina" title="Troponina">troponina</a>, legata a sua volta alla tropomiosina. La molecola di miosina è formata da una parte filamentosa e da una testa globulare unite tra loro da una porzione flessibile. I filamenti di miosina sono formati da più molecole associate in fasci in cui le teste sporgono all'esterno. </p> <div class="mw-heading mw-heading2"><h2 id="Meccanismo_della_contrazione_delle_fibrocellule">Meccanismo della contrazione delle fibrocellule</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Fibrocellula&amp;veaction=edit&amp;section=2" title="Modifica la sezione Meccanismo della contrazione delle fibrocellule" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Fibrocellula&amp;action=edit&amp;section=2" title="Edit section&#039;s source code: Meccanismo della contrazione delle fibrocellule"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Nel <a href="/wiki/Citoplasma" title="Citoplasma">citoplasma</a> è da notare la struttura chiamata tubulo T (invaginazione del sarcolemma) e il reticolo endoplasmatico liscio (reticolo sarcoplasmatico) molto sviluppato che costituisce la cosiddetta "triade", con funzione di rilascio e di assorbimento di ioni <a href="/wiki/Calcio_(metallo)" class="mw-redirect" title="Calcio (metallo)">calcio</a>, i quali permettono il fenomeno contrattile. Esso ha inizio nel momento in cui arriva alla fibrocellula l'impulso nervoso. I neuroni trasportano tale impulso sino al <a href="/wiki/Sarcolemma" title="Sarcolemma">sarcolemma</a>. Si ha così un'onda di <a href="/wiki/Depolarizzazione" title="Depolarizzazione">depolarizzazione</a> che crea una liberazione di calcio dal sarcolemma in grado di attivare la miosina che a sua volta, con un meccanismo <a href="/wiki/Enzima" title="Enzima">enzimatico</a>, induce nei mitocondri la trasformazione di <a href="/wiki/Adenosina_trifosfato" title="Adenosina trifosfato">ATP</a> in <a href="/wiki/Adenosina_difosfato" title="Adenosina difosfato">ADP</a> (<a href="/wiki/Idrolisi" title="Idrolisi">idrolisi</a> dell'ATP). La consequenziale liberazione di <a href="/wiki/Energia" title="Energia">energia</a> favorisce lo scivolamento dei filamenti di actina fra quelli di miosina determinando così la vera e propria contrazione. </p> <div class="mw-heading mw-heading2"><h2 id="Reclutamento">Reclutamento</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Fibrocellula&amp;veaction=edit&amp;section=3" title="Modifica la sezione Reclutamento" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Fibrocellula&amp;action=edit&amp;section=3" title="Edit section&#039;s source code: Reclutamento"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Le fibrocellule vengono eccitate dalle unità neuromotorie a determinate frequenze di stimolazione (reclutamento temporale), dove maggiore è la frequenza di stimolazione e maggiore sarà la forza esercitata dalla stessa, inoltre la precisione nel controllare la forza di un muscolo dipende anche dal numero di fibre muscolari associate per unità motoria, dove un'elevata associazione porta a rapidi incrementi di forza, ma a un controllo non ottimale della stessa, mentre con poche fibre associate per ogni unità si permette un controllo molto preciso, in quanto possono essere attivati solo alcuni neuromotori (reclutamento spaziale), permettendo l'eccitazione di solo una porzione delle fibrocellule che compongono un muscolo.<br /> In ambito pragmatico il reclutamento spaziale viene descritto con la legge di Henneman, che descrive come vengono eccitate le varie fibrocellule al variare del carico, anche se non sempre aderente alla realtà dei fatti, soprattutto in particolari situazioni operative, invece per quanto concerne il reclutamento temporale, maggiore è la rapidità e la forza richiesta e maggiore è la frequenza con cui avviene lo stimolo.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">&#91;</span>1<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Note">Note</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Fibrocellula&amp;veaction=edit&amp;section=4" title="Modifica la sezione Note" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Fibrocellula&amp;action=edit&amp;section=4" title="Edit section&#039;s source code: Note"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-1"><a href="#cite_ref-1"><b>^</b></a> <span class="reference-text"><cite class="citation web" style="font-style:normal"> <a rel="nofollow" class="external text" href="https://web.archive.org/web/20170307124634/http://prospettivafitness.it/il-reclutamento-delle-fibre-muscolari/"><span style="font-style:italic;">Il reclutamento delle fibre muscolari</span></a>, su <span style="font-style:italic;">prospettivafitness.it</span>. <small>URL consultato il 27 agosto 2017</small> <small>(archiviato dall'<abbr title="http&#58;//prospettivafitness.it/il-reclutamento-delle-fibre-muscolari/">url originale</abbr> il 7 marzo 2017)</small>.</cite></span> </li> </ol></div> <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=Fibrocellula&amp;veaction=edit&amp;section=5" 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=Fibrocellula&amp;action=edit&amp;section=5" title="Edit section&#039;s source code: Voci correlate"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Muscolo_scheletrico" class="mw-redirect" title="Muscolo scheletrico">Muscolo scheletrico</a></li> <li><a href="/wiki/Muscolo_liscio" class="mw-redirect" title="Muscolo liscio">Muscolo liscio</a></li> <li><a href="/wiki/Muscolo_cardiaco" class="mw-redirect" title="Muscolo cardiaco">Muscolo cardiaco</a></li> <li><a href="/wiki/Tessuto_muscolare" title="Tessuto muscolare">Tessuto muscolare</a></li> <li><a href="/wiki/Sarcoplasma" class="mw-redirect" title="Sarcoplasma">Sarcoplasma</a></li> <li><a href="/wiki/Sarcolemma" title="Sarcolemma">Sarcolemma</a></li> <li><a href="/wiki/Fibra_muscolare" class="mw-redirect" title="Fibra muscolare">Fibra muscolare</a></li> <li><a href="/wiki/Trigliceridi_intramuscolari" title="Trigliceridi intramuscolari">Trigliceridi intramuscolari</a></li> <li><a href="/wiki/Fibra_muscolare_rossa" class="mw-redirect" title="Fibra muscolare rossa">Fibra muscolare rossa</a></li> <li><a href="/wiki/Fibra_muscolare_intermedia" class="mw-redirect" title="Fibra muscolare intermedia">Fibra muscolare intermedia</a></li> <li><a href="/wiki/Fibra_muscolare_bianca" class="mw-redirect" title="Fibra muscolare bianca">Fibra muscolare bianca</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=Fibrocellula&amp;veaction=edit&amp;section=6" 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=Fibrocellula&amp;action=edit&amp;section=6" title="Edit section&#039;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.wiktionary.org/wiki/fibrocellula" class="extiw" title="wikt:fibrocellula">Wikizionario</a></li> <li class="" title=""><span class="plainlinks" title="commons:Category:Myocytes"><a class="external text" href="https://commons.wikimedia.org/wiki/Category:Myocytes?uselang=it">Wikimedia Commons</a></span></li></ul></div> <ul><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/fibrocellula" class="extiw" title="wikt:fibrocellula">fibrocellula</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 sulla <b><span class="plainlinks"><a class="external text" href="https://commons.wikimedia.org/wiki/Category:Myocytes?uselang=it">fibrocellula</a></span></b></li></ul> <div class="mw-heading mw-heading2"><h2 id="Collegamenti_esterni">Collegamenti esterni</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Fibrocellula&amp;veaction=edit&amp;section=7" title="Modifica la sezione Collegamenti esterni" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Fibrocellula&amp;action=edit&amp;section=7" title="Edit section&#039;s source code: Collegamenti esterni"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li class="mw-empty-elt"></li> <li><cite id="CITEREFBritannica.com" class="citation web" style="font-style:normal">(<span style="font-weight:bolder; font-size:80%"><abbr title="inglese">EN</abbr></span>) <a rel="nofollow" class="external text" href="https://www.britannica.com/science/myocyte"><span style="font-style:italic;">myocyte</span></a>, su <span style="font-style:italic;"><a href="/wiki/Enciclopedia_Britannica" title="Enciclopedia Britannica">Enciclopedia Britannica</a></span>, Encyclopædia Britannica, Inc.</cite> <span class="mw-valign-text-top noprint" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q428914#P1417" title="Modifica su Wikidata"><img alt="Modifica su Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/10px-Blue_pencil.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/15px-Blue_pencil.svg.png 1.5x, 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th{color:var(--color-base)!important}html.skin-theme-clientpref-night .mw-parser-output .navbox_abovebelow,html.skin-theme-clientpref-night .mw-parser-output .navbox_group{background:var(--background-color-interactive-subtle)!important}html.skin-theme-clientpref-night .mw-parser-output .subnavbox_group{background:var(--background-color-neutral-subtle)!important}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .navbox>tbody>tr:first-child>th{background:var(--background-color-interactive)!important}html.skin-theme-clientpref-os .mw-parser-output .navbox th{color:var(--color-base)!important}html.skin-theme-clientpref-os .mw-parser-output .navbox_abovebelow,html.skin-theme-clientpref-os .mw-parser-output .navbox_group{background:var(--background-color-interactive-subtle)!important}html.skin-theme-clientpref-os .mw-parser-output .subnavbox_group{background:var(--background-color-neutral-subtle)!important}}</style><table class="navbox mw-collapsible mw-collapsed noprint metadata" id="navbox-Tessuto_muscolare"><tbody><tr><th colspan="3"><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:Tessuto_muscolare" title="Template:Tessuto muscolare"><span title="Vai alla pagina del template">V</span></a>&#160;·&#160;<a href="/w/index.php?title=Discussioni_template:Tessuto_muscolare&amp;action=edit&amp;redlink=1" class="new" title="Discussioni template:Tessuto muscolare (la pagina non esiste)"><span title="Discuti del template">D</span></a>&#160;·&#160;<a class="external text" href="https://it.wikipedia.org/w/index.php?title=Template:Tessuto_muscolare&amp;action=edit"><span title="Modifica il template. Usa l&#39;anteprima prima di salvare">M</span></a></div></div><span class="navbox_title"><a href="/wiki/Istologia" title="Istologia">Istologia</a>: <a href="/wiki/Tessuto_muscolare" title="Tessuto muscolare">tessuto muscolare</a></span></th></tr><tr><th colspan="1" class="navbox_group" style="text-align:right;"><a href="/wiki/Muscolo_scheletrico" class="mw-redirect" title="Muscolo scheletrico">Muscolo scheletrico</a></th><td colspan="1" class="navbox_list navbox_odd" style="text-align:left;"><a href="/wiki/Epimisio" title="Epimisio">Epimisio</a> <b>&#183;</b> <a href="/w/index.php?title=Fascio_muscolare&amp;action=edit&amp;redlink=1" class="new" title="Fascio muscolare (la pagina non esiste)">Fascio</a> <b>&#183;</b> <a href="/wiki/Perimisio" title="Perimisio">Perimisio</a> <b>&#183;</b> <a href="/wiki/Endomisio" title="Endomisio">Endomisio</a> <b>&#183;</b> <a href="/wiki/Fibra_muscolare" class="mw-redirect" title="Fibra muscolare">Fibra muscolare</a> (<a href="/w/index.php?title=Fibra_intrafusale&amp;action=edit&amp;redlink=1" class="new" title="Fibra intrafusale (la pagina non esiste)">intrafusale</a>, <a href="/w/index.php?title=Fibra_extrafusale&amp;action=edit&amp;redlink=1" class="new" title="Fibra extrafusale (la pagina non esiste)">extrafusale</a>) <b>&#183;</b> <a href="/wiki/Miofibrilla" title="Miofibrilla">Miofibrilla</a> <p><a href="/wiki/Sarcomero" title="Sarcomero">Sarcomero (bande a, i, h; linee z, m)</a> <b>&#183;</b> <a href="/w/index.php?title=Miofilamento&amp;action=edit&amp;redlink=1" class="new" title="Miofilamento (la pagina non esiste)">Miofilamenti</a> (<a href="/wiki/Actina" title="Actina">filamento sottile/actina</a>, <a href="/wiki/Miosina" title="Miosina">filamento spesso/miosina</a>, <a href="/wiki/Timina" title="Timina">filamento elastico/timina</a>, <a href="/wiki/Nebulina" title="Nebulina">nebulina</a>) <b>&#183;</b> <a href="/wiki/Tropomiosina" title="Tropomiosina">Tropomiosina</a> <b>&#183;</b> <a href="/wiki/Troponina" title="Troponina">Troponina</a> (<a href="/w/index.php?title=Troponina_T&amp;action=edit&amp;redlink=1" class="new" title="Troponina T (la pagina non esiste)">T</a>, <a href="/wiki/Troponina_C" title="Troponina C">C</a>, <a href="/wiki/Troponina_I" title="Troponina I">I</a>) </p><p><a href="/wiki/Costamero" title="Costamero">Costamero</a> (<a href="/w/index.php?title=Distrofisina&amp;action=edit&amp;redlink=1" class="new" title="Distrofisina (la pagina non esiste)">distrofisina</a>, <a href="/w/index.php?title=Distrobrevina&amp;action=edit&amp;redlink=1" class="new" title="Distrobrevina (la pagina non esiste)">α,β-distrobrevina</a>, <a href="/w/index.php?title=Sincoina&amp;action=edit&amp;redlink=1" class="new" title="Sincoina (la pagina non esiste)">sincoina</a>, <a href="/wiki/Desmosina" title="Desmosina">desmosina</a>, <a href="/w/index.php?title=Disbindina&amp;action=edit&amp;redlink=1" class="new" title="Disbindina (la pagina non esiste)">disbindina</a>, <a href="/w/index.php?title=Sarcoglicane&amp;action=edit&amp;redlink=1" class="new" title="Sarcoglicane (la pagina non esiste)">sarcoglicani</a>, <a href="/w/index.php?title=Distroglicane&amp;action=edit&amp;redlink=1" class="new" title="Distroglicane (la pagina non esiste)">distroglicani</a>, <a href="/w/index.php?title=Sarcospan&amp;action=edit&amp;redlink=1" class="new" title="Sarcospan (la pagina non esiste)">sarcospan</a>) <b>&#183;</b> <a href="/wiki/Desmina" title="Desmina">Desmina</a> <b>&#183;</b> <a href="/wiki/Giunzione_neuromuscolare" title="Giunzione neuromuscolare">Giunzione neuromuscolare</a> <b>&#183;</b> <a href="/wiki/Unit%C3%A0_motrice" class="mw-redirect" title="Unità motrice">Unità motrice</a> <b>&#183;</b> <a href="/wiki/Fuso_neuromuscolare" title="Fuso neuromuscolare">Fuso neuromuscolare</a> <b>&#183;</b> <a href="/w/index.php?title=Accoppiamento_eccitazione-contrazione&amp;action=edit&amp;redlink=1" class="new" title="Accoppiamento eccitazione-contrazione (la pagina non esiste)">Accoppiamento eccitazione-contrazione</a> </p> <a href="/wiki/Mioblasto" title="Mioblasto">Mioblasto</a> <b>&#183;</b> <a href="/wiki/Cellula_satellite" title="Cellula satellite">Cellula satellite</a> <b>&#183;</b> <a href="/wiki/Sarcoplasma" class="mw-redirect" title="Sarcoplasma">Sarcoplasma</a> <b>&#183;</b> <a href="/wiki/Sarcolemma" title="Sarcolemma">Sarcolemma</a> <b>&#183;</b> <a href="/wiki/Reticolo_sarcoplasmatico" title="Reticolo sarcoplasmatico">Reticolo sarcoplasmatico</a></td><td rowspan="3" class="navbox_image"><figure class="mw-halign-right" typeof="mw:File"><a href="/wiki/File:Skeletal_muscle_-_longitudinal_section.jpg" class="mw-file-description" title="Tessuto muscolare"><img alt="Tessuto muscolare" src="//upload.wikimedia.org/wikipedia/commons/thumb/5/56/Skeletal_muscle_-_longitudinal_section.jpg/100px-Skeletal_muscle_-_longitudinal_section.jpg" decoding="async" width="100" height="75" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/56/Skeletal_muscle_-_longitudinal_section.jpg/150px-Skeletal_muscle_-_longitudinal_section.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/56/Skeletal_muscle_-_longitudinal_section.jpg/200px-Skeletal_muscle_-_longitudinal_section.jpg 2x" data-file-width="696" data-file-height="522" /></a><figcaption>Tessuto muscolare</figcaption></figure></td></tr><tr><th colspan="1" class="navbox_group" style="text-align:right;"><a href="/wiki/Muscolo_cardiaco" class="mw-redirect" title="Muscolo cardiaco">Muscolo cardiaco</a></th><td colspan="1" class="navbox_list navbox_even" style="text-align:left;"><a href="/wiki/Miocardio" title="Miocardio">Miocardio</a> <b>&#183;</b> <a href="/w/index.php?title=Disco_intercalato&amp;action=edit&amp;redlink=1" class="new" title="Disco intercalato (la pagina non esiste)">Disco intercalato</a></td></tr><tr><th colspan="1" class="navbox_group" style="text-align:right;"><a href="/wiki/Muscolo_liscio" class="mw-redirect" title="Muscolo liscio">Muscolo liscio</a></th><td colspan="1" class="navbox_list navbox_odd" style="text-align:left;"><a href="/wiki/Calmodulina" title="Calmodulina">Calmodulina</a> <b>&#183;</b> <a href="/w/index.php?title=Muscolo_liscio_vascolare&amp;action=edit&amp;redlink=1" class="new" title="Muscolo liscio vascolare (la pagina non esiste)">Muscolo liscio vascolare</a></td></tr><tr><th colspan="3" class="navbox_abovebelow">Gli alti tre tessuti: <a href="/wiki/Tessuto_epiteliale" title="Tessuto epiteliale">Tessuto epiteliale</a><b>&#160;·</b> <a href="/wiki/Tessuto_connettivo" title="Tessuto connettivo">Tessuto connettivo</a><b>&#160;·</b> <a href="/wiki/Tessuto_nervoso" title="Tessuto nervoso">Tessuto nervoso</a></th></tr></tbody></table> <style data-mw-deduplicate="TemplateStyles:r140554510">.mw-parser-output .CdA{border:1px solid #aaa;width:100%;margin:auto;font-size:90%;padding:2px}.mw-parser-output .CdA 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