Choanocytes perform------excretion, reproduction, digestion (nutrition) , secretion of spicules??
Solution:
Choanocytes or collar cells are cells which line the spongocoel and the canals of sponges. These cells are flagellated cells surrounded by a collar. Flagellum beat regularly maintaining water flow through the body and helps in filtering nutrients from the water. Movement of flagella help in creating water flow from ostia to osculum through spongocoel. This is the characteristic feature of the kingdom Porifera.
Hence, Choanocytes performs excretion.
Choanocytes or collar cells are cells which line the spongocoel and the canals of sponges. These cells are flagellated cells surrounded by a collar. Flagellum beat regularly maintaining water flow through the body and helps in filtering nutrients from the water. Movement of flagella help in creating water flow from ostia to osculum through spongocoel. This is the characteristic feature of the kingdom Porifera.
Hence, Choanocytes performs excretion.