Cells of the Outer Surface of a Sponge Obtain Food

Question

Cells of the outer surface of a sponge obtain food through ____.  
A) absorbing food that diffuses from the central cavity
B) capturing food in their microvilli
C) collar cells engulfing food by phagocytosis
D) amoeba-like cells engulfing food by phagocytosis
E) poisoning small fish that contact them

Accepted Answer

Collar cells, also known as choanocytes, are responsible for engulfing food through phagocytosis in sponges. These cells have a flagellum surrounded by a collar of microvilli that trap and ingest food particles from the water.