Viene formato da file di cellule che risultano leggermente appiattite. Le cellule di questo strato hanno la funzione di sintetizzare involucrina e loricrina , che si depositano sulla superficie interna della membrana cellulare, provocando un loro ispessimento. Nel citoplasma si trovano grossi granuli basofili detti cheratoialini, contenenti una sostanza omogenea chiamata cheratolina. Le cellule dello strato granuloso dell'epidermide inoltre contribuiscono alla creazione di una barriera per proteggere l'epidermide, sia con l'involucrina e locricrina poste sul versante citosolico del plasmalemma , sia secernendo i corpi multillamellari corpuscoli dalla forma bastoncellare, in cui il lipide acilglusilceramide una volta secreto si dispone a creare uno strato tra lo strato corneo e granuloso e alla creazione di questa barriera contribuiscono anche le giunzioni occludenti tra le cellule dello strato granuloso. Da Wikipedia, l'enciclopedia libera. Portale Anatomia.

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Strato lucido



Strato granuloso



Netter. Atlante di anatomia fisiopatologia e clinca: apparato tegumentario.


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