Biology / Bio 2237 · Atom · ~20 seconds
Phylum Porifera: Body Structure without True Tissues
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A sponge's body lacks true tissues and organs, relying on pores and internal water channels lined by flagellated cells to filter food.
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A sponge's choanocytes beat their flagella to draw water through the body, trapping food particles as it passes.
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Lacking true tissues does not exclude sponges from Animalia — they still develop from a blastula, sharing the kingdom's other features.