
1) Collar cell 2) Flagellated cell
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https://www.crosswordclues.com/clue/choanocyte

1) Collarcell
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https://www.crosswordclues.com/clue/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, or undulipodia, surrounded by a collar of microvilli which are connected by a thin membrane. They make up Choanoderm, a type of cell layer found in sponges. The cell has the closest r.....
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http://en.wikipedia.org/wiki/Choanocyte

(from the article `reproductive behaviour`) ...both sperm and eggs, but often at different times to prevent self-fertilization. The sperm are swept by water currents into another sponge, where ... ...of an egg by a spermatozoan is peculiar in sponges in that a spermatozoan, after its release from a sponge, is carried by the water curren...
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http://www.britannica.com/eb/a-z/c/75

[
n] - any of the flagellated cells in sponges having a collar of cytoplasm around the flagellum
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http://www.webdictionary.co.uk/definition.php?query=choanocyte

choanocyte One of the cells that line the flagellated chambers of sponges, also found in some protozoa.
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http://www.wordinfo.info/words/index/info/view_unit/452/
collar cell 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
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https://www.encyclo.co.uk/local/20974

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
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https://www.infoplease.com/dictionary/choanocyte
No exact match found.