Question

what is the use of valves in viens​

Answer 1

Answer:

YOUR ANSWER IS

Explanation:

Veins have valves which prevent backflow of blood which taken up from other. This blood has low pressure, so valves help to provide pressure to make the blood move. The valves prevent blood from sinking down and settling into the legs, mainly due to gravity.

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Answer 2

Answer:

To stop the back flow of blood...........