HISTOLOGY
BLOOD VESSELS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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True
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False
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Either A or B
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None of the above
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Detailed explanation-1: -Medium and large veins have venous valves, similar to the semilunar valves associated with the heart, that help keep the blood flowing toward the heart. Venous valves are especially important in the arms and legs, where they prevent the backflow of blood in response to the pull of gravity.
Detailed explanation-2: -Veins have valves which stop the blood from flowing backward. This is because blood pressure in veins is very low (compared to arteries).
Detailed explanation-3: -Arteries are blood vessels that carry oxygenated blood to all parts of the body. They have thick muscular walls and have no valves in their inner linings. Veins carry deoxygenated blood and have thin muscular wall. They have valves in their inner lining to prevent the backward flow of blood.