Choanocyte
- Choanocyte
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Les choanocytes sont des cellules endodermiques caractéristiques des éponges. De structure fine, cette cellule est dotée d'une collerette et d'un fouet (ou un flagelle) permettant de ramener des aliments. En outre elle est pourvue d'un noyau et de vacuoles digestives. Très proche de la cellule des flagellés (au point que ceux-ci sont appelés « choanoflagellés »), le choanocyte est un caractère dérivé propre qui détermine en partie le clade des spongiaires.
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choanocyte — cho a*no*cyte (k[=o] [.a]*n[ o]*s[imac]t ; k[=o]*[a^]n [ o]*s[imac]t ), n. [Gr. choa nh funnel + cyte.] any of the flagellated cells in sponges having a collar of cytoplasm around base of the flagellum; they maintain a flow of water through the… … The Collaborative International Dictionary of English
choanocyte — ● choanocyte nom masculin (grec khoanos, entonnoir) Cellule animale propre aux spongiaires et à certains protistes, et qui porte un flagelle entouré à sa base d une collerette. (Les choanocytes assurent la circulation de l eau, la capture des… … Encyclopédie Universelle
choanocyte — noun Etymology: International Scientific Vocabulary choan funnel shaped (from Greek choanē funnel) + cyte Date: 1888 collar cell … New Collegiate Dictionary
Choanocyte — Choanocytes (also known as collar cells ) are cells that line the interior of Asconoid, syconoid and leuconoid body type sponges that contain a central flagellum surrounded by a collar of microvilli which are connected by a thin membrane. It is… … Wikipedia
choanocyte — n. [Gr. choane, funnel; kytos, container] (PORIFERA) A flagellate cell crowned by a collar of cytoplasmic tentacles that generates currents of water; a collar cell … Dictionary of invertebrate zoology
choanocyte — choanocytal, adj. /koh euh neuh suyt , koh an euh /, n. Zool. one of the flagellated cells lining the inner cavity of a sponge, having a collar of protoplasm encircling the base of the flagellum. Also called collar cell. [1885 90; < Gk choán(e)… … Universalium
choanocyte — noun any of the cells in sponges that contain a flagellum, and are used to control the movement of water … Wiktionary
choanocyte — cho·a·no·cyte … English syllables
choanocyte — noun any of the flagellated cells in sponges having a collar of cytoplasm around the flagellum; they maintain a flow of water through the body • Syn: ↑collar cell • Hypernyms: ↑flagellated cell … Useful english dictionary
choanocyte chamber — (PORIFERA) A cavity enclosed by a group of choanocytes … Dictionary of invertebrate zoology
