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Why is double circulation important in humans?

Answer and explanation

Correct answer: It creates separate blood routes for lungs and body

The governing concept is double circulation in the human circulatory system. In one complete cycle, deoxygenated blood travels from the heart to the lungs for oxygenation, and oxygenated blood returns to the heart before being pumped to the whole body. This separation prevents excessive mixing and supports efficient oxygen delivery at suitable pressure. Thus option A is correct; the other options concern digestion, plants, or an incorrect route for urine.

Related tags

Double-CirculationHeartHuman-TransportLife ProcessesWorld Of LivingScienceClass 10 Mcq

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