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Sponges and hydra neither require a …

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Sponges and hydra neither require a circulatory system nor a circulatory fluid like blood. Why

Posted by Sohan Das 6 years, 1 month ago

CBSE > Class 07 > Science

1 answers

Arya Anupam 6 years, 1 month ago

In sponges and hydra, the water in (which they live) bring food and oxygen as it enters their bodies. The water also carries away carbon dioxide and other waste materials as it moves out of their bodies. Thus, water do transportation of their bodies, they don't need any circulatory system nor blood. THANKS.

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