BLOOD CARDIOVASCULAR SYSTEM LYMPHOID ORGANS
BLOOD
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Arteries contain valves that prevent backward flow of blood.
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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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Explanation:
Detailed explanation-1: -The valves prevent the backward flow of blood. Valves are actually flaps (leaflets) that act as one-way inlets for blood coming into a ventricle and one-way outlets for blood leaving a ventricle. Normal valves have 3 flaps (leaflets), except the mitral valve.
Detailed explanation-2: -A set of valves exist between each atrium and ventricle, preventing blood from flowing backwards into the atria. Another set of valves exist between the ventricle and arteries, preventing blood flow back into the ventricles.
Detailed explanation-3: -Mitral valve: This valve has two leaflets. They allow blood to flow from the lungs into the left atrium. And they prevent backward flow from the left ventricle to the left atrium.
There is 1 question to complete.