Question

Poriferans have holes or pores all over the body that lead to a system that helps in circulating water to bring in food and oxygen. Name the system.

Answer 1

Canal system.

1. The word Porifera means organisms with holes.
2. There are holes or pores all over the body.
3. A Canal system is a system of pores, canals and chambers through which water circulates with the help of uniflagellated choanocytes.
4. The Canal system helps in food gathering, respiratory exchange, and waste removal.