The Currents of Water (Containing Food) That Pass Through a Sponge

Question

The currents of water (containing food) that pass through a sponge are maintained by
A) a water- vascular system.
B) ganglia.
C) the osculum.
D) collar cells.
E) medusae.

Accepted Answer

Collar cells, also known as choanocytes, have flagella that create water currents and help in trapping food particles in sponges.