In sponges,the canal system develops due to:

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(B) In sponges (Phylum $Porifera$),the body wall consists of two layers: an outer $pinacoderm$ and an inner $choanoderm$. The complex canal system,als

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Folding of inner walls

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(B) In sponges (Phylum $Porifera$),the body wall consists of two layers: an outer $pinacoderm$ and an inner $choanoderm$. The complex canal system,also known as the $aquiferous$ system,is formed due to the extensive folding and invagination of these inner body walls. This system facilitates water circulation,which is essential for nutrition,respiration,and excretion.

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