The inter-communicating cavities in the body of a sponge constitue

Water enters the body of sponges through

Water enters the body of sponges through

Name the opening through which water leaves the body cavity of sponges. What is this body cavity called?

Name the following : (a) Cavity present in the body of sponges (b) Cavity present in the body of cnidarians.

Which special cells are present in the body of sponges (Porifera) ?

Body cavity is lined by mesoderm in