veins have valves.why?
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Answered by
1
Answer:
veins contain valves that ensure blood flows in only one direction. Valves also help blood travel back to the heart against the force of gravity.
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Answered by
1
Answer:
to stop the blood from flowing backward
Explanation:
when the blood from capillaries enters the veins then to stop the blood from flowing backward valves helps the veins and also due to the reason that the blood is moving upward to the right atrium of the heart so to prevent the blood from flowing backwards the valve in the veins are necessary
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