Describe the canal system of sponges. - Vidyadip

Question

Describe the canal system of sponges.

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Answer

The characteristic canal system through which water circulates, helps in nutrition, respiration and excretion of the animal.
Body wall has a number of small openings, called ostia, through which water enters the body.
Through radial canals, the water reaches the spongocoel.
Water carrying wastes comes out through a large terminal opening, called osculum.
Spongocoel and the canals are lined by flagellated collar cells, called choanocytes.

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