Question

why are the piriferans called sponges​

Answer 1

Explanation:

The word Porifera means that there are presence of pores all over the body,the animals under this phylum are mostly marine and these are asymmetrical animals . These are known as sponges because their body behaves like a sponge because their body is soft,smooth,presence of pores and their body is just an aggregation of cells .

Answer 2

Answer:

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Explanation:

The name porifera means 'pore bearer' in Latin (a pore is a tiny hole). A sponge's body is covered by a skin, one cell thick. This skin has lots of small pores and a few large openings. ... These collar cells pump water through the entire sponge and filter out food for the sponge cells to eat.