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How does the four-chambered human heart help meet the body's energy requirement better?

Answer and explanation

Correct answer: It keeps oxygenated and deoxygenated blood separate

The governing concept is separation of oxygenated and deoxygenated blood in double circulation. The right side sends oxygen-poor blood to the lungs, while the left side pumps oxygen-rich blood to the body at good pressure. This supports efficient aerobic respiration and greater energy release in cells. Therefore option A is correct; the other options confuse circulation with digestion, excretion, or lung function.

Related tags

HeartFour-Chambered-HeartAerobic-RespirationCirculationLife ProcessesWorld Of LivingScienceClass 10 Mcq

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