MEDICAL
ARTERIES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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support them
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protect them
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prevent the backward movement inside them
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provide them elesticity
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Detailed explanation-1: -Thus, valves help the return of blood to the heart-by opening when the blood flows toward the heart and closing when blood might flow backward. The deep veins play a significant role in pushing blood toward the heart. The one-way valves in deep veins prevent blood from flowing backward.
Detailed explanation-2: -The one-way valves in deep veins prevent blood from flowing backward. The muscles surrounding the deep veins squeeze the veins, helping force the blood toward the heart, just as squeezing a toothpaste tube ejects toothpaste.
Detailed explanation-3: -What are heart valves? The heart has 4 chambers, 2 upper chambers (atria) and 2 lower chambers (ventricles). Blood passes through a valve before leaving each chamber of the heart. The valves prevent the backward flow of blood.