Question

in sponges,which structures is used for excretion? please don't copy from google guys.​

Answer 1

Answer:

there is a large opening at the top called Osculum which they use for excretion

Explanation:

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Answer 2

Answer:

The osculum which helps in excretion. The small pores are known as ostia.

Canal system is the waste matter is carried away by the outgoing water current..

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