Question

In sponge, prosopyle is a

• A. Cell at the opening of incurrent canal
• B. Smaller canal and connects incurrent canal with radial canal
• C. Cell which form lining of spongocoel
• D. Contractile element at osculum

Answer 1

Answer: (B)

Smaller canal and connects incurrent canal with radial canal

Prosopyle in sponges is a pore through which water is drawn from the outside into one of the saclike chambers formed by evagination of the body wall. The incurrent pores or ostia, found on the outer surface of the body opens into the incurrent canals, which lead into adjacent radial canals through these minute openings, known as prosopyles. Prosopyle is present only in asconoid and syconoid sponges.

So, the correct answer is option B.