Question

Answer the question by choosing correct option.Which special cells are present in the body of sponges (Porifera)?
1. Collar cells.
2. Cnidoblasts.
3. Germ cells.
4. Ectodermal cells.

Answer 1

Collar cells are the answer to this question. It is made up of microvilli. This layer of collar cells represents endoderm of a diploblastic poriferan organism.

Digestion also takes place in collar cell. Microscopic food particles are captured in these cells.

The flagella aids in creating a unidirectional flow of water all around the body of a sponge.

This also helps in regulating a constant flow of water all around the cell body.