Question

Animal with no internal organs muscles or nerves water can filter through their bodies

Answer 1

Their bodies are porous. They are filter feeders; water flows in through many small openings called ostia , and out through fewer, large openings called osculum.
it is characteristic of porifera phylum (kingdom animalia).

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Answer 2

Answer:

Their body are porous. They are filter feeders, water flows in through many small openings called ostia and flows out through large openings called osculum,it is the characteristic of porifera phylum (kingdom animailia