PHYSIOLOGY
CARDIOVASCULAR PHYSIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Blood returning to the heart from the pulmonary circuit first enters the
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right atrium.
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right ventricle
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left atrium
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left ventricle
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Explanation:
Detailed explanation-1: -In the lungs, the blood receives oxygen then leaves through the pulmonary veins. It returns to the heart and enters the left atrium. From there, blood is forced through the mitral valve into the left ventricle. This is the muscular pump that sends blood out to the rest of the body.
Detailed explanation-2: -Deoxygenated blood then moves from the capillary beds through venules into the systemic veins. The systemic veins feed into the inferior and superior venae cavae, the largest veins in the body. The venae cavae flow deoxygenated blood to the right atrium of the heart.
Detailed explanation-3: -Oxygen-rich blood travels from your lungs to your left atrium through large veins called pulmonary veins.
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