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How do the lungs and blood circulation together support cellular respiration?

Answer and explanation

Correct answer: The lungs add oxygen to the blood, and the blood carries it to cells

The governing concept is coordination between gas exchange and transport. In the alveoli of the lungs, oxygen from inhaled air diffuses into the blood, while carbon dioxide diffuses out. The circulatory system then carries oxygen, mainly bound to haemoglobin, to body cells. Cells use it to release energy from food during aerobic respiration, and the blood carries carbon dioxide back toward the lungs. Therefore option A is correct.

Related tags

LungsBlood CirculationCellular RespirationRespirationLife ProcessesScienceClass 10 Mcq

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