Question

What is water canal system? Explain with example.​

Answer 1

The canal system helps the sponges in nutrition, respiration, excretion and reproduction. The current of water which flows through the canal system brings the food and oxygen and takes away the carbon dioxide, nitrogenous wastes and faeces. It carries the sperms from one sponge to another for fertilisation of the ova.

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Answer 2

Answer:

The water current impelled by the flagella of the choanocytes passes through the spongocoel and goes out through osculum. This pathway of water transport is helpful in food gathering, respiratory exchange and removal of waste.

Eg: spongilla, sycon, euspongia