Question

why do arteries have thick walls and veins have thin walls?

Answer 1

Answer:

Arteries and arterioles have thicker walls than veins and venules because they are closer to the heart and receive blood that is surging at a far greater pressure.

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Answer 2

Answer:

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Explanation:

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. ... Veins may dilate to accommodate increased blood volume.