Body having meshwork of cells, internal cavities lined with food filtering flagellated cells and indirect development are the characteristic of phylum
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Coelenterate
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Porifera
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Mollusca
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Protozoa
B.
Porifera
In Porifera (sponges), bodies are asymmetrical. Body lacks tissues or organs, but from a meshwork of cells surrounding channels that open to the outside through pores, and that expand into internal cavities lined with food filtering flagellated cells (choanocytes).