choanocyte

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cho·an·o·cyte

(kō-ăn′ə-sīt′)

One of a layer of flagellated cells lining the body cavity of a sponge and characterized by a collar of cytoplasm surrounding the flagellum. Also called collar cell.

[Greek khoanē, funnel (from khein, to pour; see gheu- in Indo-European roots) + -cyte.]

choanocyte

(ˈkəʊənəˌsaɪt)

(Zoology) any of the flagellated cells in sponges that maintain a flow of water through the body. A collar of protoplasm surrounds the base of the flagellum. Also called: collar cell

[C19: from Greek khoanē funnel (from khein to pour) + -cyte]

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Noun

choanocyte - any of the flagellated cells in sponges having a collar of cytoplasm around the flagellum; they maintain a flow of water through the body

collar cell

flagellated cell - any cell or one-celled organism equipped with a flagellum

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References in periodicals archive ?

These choanocyte chambers (ChC) are considered the morphofunctional units of the sponge.

Aquaporin in Chondrosia reniformis Nardo, 1847 and its possible role in the interaction between cells and engulfed siliceous particles

Amazingly, half of the sponge's choanocyte (filtration) cells had divided and the choanocyte's cell division cycle was a phenomenally short 5.

Sponges recycle carbon to give life to coral reefs

The narrower canals and smaller choanocyte chambers may result in a reduced water flow when compared to LMA sponges (Weisz et al.

The HMA-LMA dichotomy revisited: an electron microscopical survey of 56 sponge species

The sponge choanocyte is considered one of the few examples of a true sieve filter in metazoans (Riisgard and Larsen, 2001).

Feeding in a calcareous sponge: particle uptake by pseudopodia

About 36 h after settlement, choanocytes are differentiated in the inner cell mass and formation of the choanocyte chamber begins.

Metamorphosis of Coeloblastula Performed by Multipotential Larval Flagellated Cells in the Calcareous Sponge Leucosolenia laxa

Male generative cells appear to originate from choanocytes that migrate into the lumen of choanocyte chambers, where spermatogenesis takes place.

Reproduction Cycles and Strategies of the Cold-Water Sponges Halisarca dujardini (Demospongiae, Halisarcida), Myxilla incrustans and lophon piceus (Demospongiae, Poecilosclerida) From the White Sea

A section through the sponge reveals two distinct regions: a cortical zone called ectosome, and an internal zone, the choanosome, which contains the choanocyte chambers.

Body polarity and mineral selectivity in the demosponge Chondrosia reniformis

The choanocytes of Acanthochaetetes wellsi possess a periflagellar sleeve; a central cell at the apopyle of the choanocyte chambers, as in the Hadromerida; and a spicule complement similar to that of the family Spirastrellidae in the order Hadromerida (Hartman and Goreau, 1975; Vacelet and Garrone, 1985; Reitner and Engeser, 1987; Boury-Esnault et al.

Polyphyly of "sclerosponges" (Porifera, Demospongiae) supported by 28S ribosomal sequences

In the sections of sponge branches we were able to identify the following epithelial cells: exopinacocytes (covering the outer sponge surface), endopinacocytes (lining the water canals), and choanocytes (lining choanocyte chambers in the canal system).

Cell localization of lectin binding in Microciona prolifera sponge

Sometime later, a canal system and choanocyte chambers are formed in the metamorphs.

Transdifferentiation of larval flagellated cells to choanocytes in the metamorphosis of the demosponge Haliclona permollis

Therefore, a study of the choanocyte chambers was also carded out.

Reproductive biology, taxonomy, and aspects of chemical ecology of Latrunculiidae (Porifera)

And a patch inside one of the tubes has pits encircled by raised collars, resembling cells called choanocytes that move water through sponges.

Possible ancestor of sponges

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