Biology, asked by parvathy18042008, 16 hours ago

10 points on blood circulation.

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Answered by adityaaa11610

1

Answer:

Introduction. ...

The circulatory system is extremely long. ...

Red blood cells must squeeze through blood vessels. ...

Big bodies have slower heart rates. ...

The heart needs not a body. ...

People have studied the circulatory system for thousands of years.

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