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
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.
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.
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.