Describe the water canal system of sponges

CBSE Class 11
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Describe the water canal system of sponges.

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  • The water canal system is a peculiar feature of sponges.
  • The body wall bears many minute pores called ostia.
  • On the anterior side of the body, there is a large single opening called the osculum.
  • Water enters the spongocoel through ostia and leaves the body through the osculum.
  • This water is used by sponges to gather food, for gas exchange, excretion etc.
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