Question

Distinguish between incurrent and radial canal

Answer 1

1 : one of the numerous minute canals lined with choanocytes which radiate from the paragastric cavity in some sponges and end just below the surface of the sponge.

2. Incurrent pores or ostia are the openings through which water first enters a sponge. These can be formed by one or more cells. The PROSPYLE is name given to the entry hole/channel/pore leading into the area of choanocytes.