ANIMAL PHYSIOLOGY
HUMAN CIRCULATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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heart
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lungs
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liver
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brain
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Detailed explanation-1: -These problems cause the valve opening to become narrow. The narrowed valve reduces or blocks blood flow from the heart to the rest of the body. Aortic valve regurgitation. The aortic valve doesn’t close properly, causing blood to flow backward into the left lower heart chamber (ventricle).
Detailed explanation-2: -Pulmonary valve: Allows blood to pass into the pulmonary arteries; prevents blood from flowing back into the right ventricle.
Detailed explanation-3: -The right ventricle pumps the blood to the lungs where it becomes oxygenated. The oxygenated blood is brought back to the heart by the pulmonary veins which enter the left atrium.
Detailed explanation-4: -A blockage in aortic valve would directly reduce blood flow to the heart.