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"clean" water and "waste" water in a sponge are all the same. Their bodies allow constant flow of water, there is no beginning and end to a sponge; thus technically waste water leaves a sponges body through its many pores.

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15y ago
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9y ago

The sea sponge removes waste through osmotic transfer with the water inside the spongocoel and this water is then passed through the osculum.

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14y ago

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Q: How do sponges feed respire and excrete?
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