Science, asked by aveerpatil11, 2 months ago

why the veins are provided with valves? why the arteries have thick wall?

Answers

Answered by boldstar

Answer:

Unlike arteries, veins contain valves that ensure blood flows in only one direction. (Arteries don't require valves because pressure from the heart is so strong that blood is only able to flow in one direction.) Valves also help blood travel back to the heart against the force of gravity.

Arteries and arterioles have relatively thick muscular walls because blood pressure in them is high and because they must adjust their diameter to maintain blood pressure and to control blood flow

Answered by Anonymous

Answer:

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Explanation:

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