why is circulatory system required
(in simple words)
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Explanation:
Blood delivers oxygen to all the body's cells. To stay alive, a person needs healthy, living cells. Without oxygen, these cells would die. If that oxygen-rich blood doesn't circulate as it should, a person could die. That's why we need circulatory system.
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The circulatory system is made up of blood vessels that carry blood away from and towards the heart. ... The circulatory system carries oxygen, nutrients, and hormones to cells, and removes waste products, like carbon dioxide. These roadways travel in one direction only, to keep things going where they should.
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