Valves are necessary in veins but not in arte | vedclass

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(C) The correct answer is $C$. Valves are present in veins to ensure that blood flows in only one direction toward the heart. Since the blood pressure

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Blood from heart may not be pushed back into veins

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(C) The correct answer is $C$. Valves are present in veins to ensure that blood flows in only one direction toward the heart. Since the blood pressure in veins is very low and the blood often has to move against gravity,there is a risk of backflow. Valves prevent this backflow. In contrast,arteries carry blood away from the heart under high pressure generated by the heart's contraction,which keeps the blood moving forward,making valves unnecessary.

Valves are necessary in veins but not in arteries because

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