Which of the following features distinguishes | vedclass

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(A) Veins are blood vessels that carry blood towards the heart. Unlike arteries,which have thick,elastic,and muscular walls to withstand high pressure

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Presence of valves to regulate blood flow

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(A) Veins are blood vessels that carry blood towards the heart. Unlike arteries,which have thick,elastic,and muscular walls to withstand high pressure,veins have thinner walls. Because blood pressure in veins is significantly lower,they possess internal valves to prevent the backflow of blood and ensure unidirectional flow towards the heart. Arteries generally have a narrow lumen,whereas veins have a wider lumen. Therefore,the presence of valves is a key distinguishing feature of veins.

Which of the following features distinguishes a vein from an artery?

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