why are values absent in the lumen of artery?
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Answer:
Main function of valve is to prevent back flow of blood. This is because blood pressure in veins is very low (compared to arteries). There is no need of valves in the arteries because the blood pressure usually varies between 70-110 mm Hg.
Explanation:
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valves are the tube like structure in the heart
Explanation:
which pumps blood and arteries are subparts of valves
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