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Related to Choanocytes: phylum Porifera


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.]


(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]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.choanocyte - any of the flagellated cells in sponges having a collar of cytoplasm around the flagellumchoanocyte - any of the flagellated cells in sponges having a collar of cytoplasm around the flagellum; they maintain a flow of water through the body
flagellated cell - any cell or one-celled organism equipped with a flagellum
References in periodicals archive ?
The inner zone is called the choanoderm or choanosome, comprising a chamber whose walls are formed from a single layer of flagellated cells, called choanocytes (Ch).
And a patch inside one of the tubes has pits encircled by raised collars, resembling cells called choanocytes that move water through sponges.
Flat tile-like features on the fossil's external surface, punctuated with small pores, resemble pinacocytes on modern sponges, whereas the fossil's inner surface is covered with a regular pattern of uniform pits, with many pits surrounded by collars, similar to sponge choanocytes.
When he and his Pathology Department colleagues went back and looked at the samples, De Goeij realised that choanocytes were shedding all over the place.
choanocytes that squat in grove after grove like Quakers at
Mae 'na nifer o blygiadau fel arfer yn wal y corff, felly mae 'na ddigon o arwynebedd a lle i'r choanocytes yma dynnu bwyd i mewn i'r anifail.
Sollas (1884) considered sponges to be an independent group because they have a simple organization and sponge choanocytes bear a strong resemblance to choanoflagellate protozoa.
Embryogenesis and metamorphosis in a haplosclerid demosponge: gastrulation and transdifferentiation of larval ciliated cells to choanocytes.
Their entire body is organized for filtering water, which is moved inside an aquiferous system by choanocytes," or pumping cells.
Sponge choanocytes are more difficult to observe in vivo, but studies that have examined particle uptake suggest that although choanocytes ingest India ink, carmine, bacteria, and latex microspheres, the collar microvilli do not stain with the dyes, nor are particles shown to be retained in great numbers on the collar microvilli (Van Trigt, 1919; Pourbaix, 1933; Schmidt, 1970; Willenz, 1980; Imsiecke, 1993).
Finally, the cells of the inner cell mass differentiate to choanocytes and are arranged in a choanoderm that surrounds a newly formed large gastral cavity.
Male generative cells appear to originate from choanocytes that migrate into the lumen of choanocyte chambers, where spermatogenesis takes place.