A member asked:

How does the circulatory system work and how essential is it?

A doctor has provided 1 answer

It is essential for: Humans can not survive without circulatory system which includes heart and blood vessels. This system provides oxygen carrying blood to all parts of the body. The heart pumps blood and the arteries carry it around and the veins return it back to heart(and lungs for oxygenation).

Answered 4/11/2016

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