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In what fundamental way does the structure of a sponge differ from that of all other animals?.

User Oleg Somov
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Answer:

Unlike other animals, they lack true tissues and organs. Some of them are radially symmetrical, but most are asymmetrical. The shapes of their bodies are adapted for maximal efficiency of water flow through the central cavity, where the water deposits nutrients and then leaves through a hole called the osculum.

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User BlueDolphin
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