Question

What is Ostia?

Answer 1

Ostia:

1. Ostia are minuscule pores present on the body walls of sponges.
2. The water enters via the Ostia into the spongocoel, the central cavity of the sponge.
3. They also aid in food transport, respiratory exchange, and waste removal.
4. They are formed by porocytes which are tube-shaped cells that function as valves to allow the fluid exchange.