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A Closed Circulatory system-Is a blood circulation system in which blood moves through the body in closed vessels.

In the closed circulatory system, the blood is confined to vessels. The heart pumps blood to vessels through smaller vessels which go to the organs. This system has a more efficient way of transporting blood then an open circulatory system.

Some animals that have this systems include earthworms, squids, octopus, and all vertebrates, like humans.

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10y ago

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