How are nutrients and oxygen transported to the different parts of the body in Hydra or Sponges?
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Animals such as sponges and Hydra do not posses any circulatory system. The water in which they live brings food and oxygen as it enters their bodies. The water carries away waste materials and carbon dioxide as it moves out. Thus, these animals do not need a circulatory fluid like the blood.
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Sponges and hydra live in water and do not have blood or any circulatory system. Water acts as a carrier of food and oxygen to their body and it also carry out waste materials and carbon dioxide from the body.
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