Biology, asked by visnupriya1610, 11 months ago

Blood flows from legs to heart against the gravity through the vein because????

Answers

Answered by gaurav6759

6

Answer:

because vein have values. These help blood to not flow back

Answered by beckyrenju

3

Explanation:

The valves close when blood starts to flow in one direction, so that blood in the veins can only flow in the direction back to the heart, which is up the legs. ... So it is a combination of blood pressure from the heart's pumping action, the valves, and muscle movement that gets the blood up the legs against gravity

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