An organ that passes oxygen to every blood cell carried through its capillaries

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Multiple Choice

An organ that passes oxygen to every blood cell carried through its capillaries

Explanation:
Gas exchange happens in the lungs at the alveolar-capillary interface. Oxygen from inhaled air diffuses across the thin walls of the alveoli into the surrounding capillaries and binds to hemoglobin in red blood cells. This oxygen-rich blood is then transported to every tissue in the body. The lungs are the organ that actually oxygenates the blood, whereas the heart pumps the oxygenated blood to the body, and the brain or stomach simply receive blood that has already been oxygenated.

Gas exchange happens in the lungs at the alveolar-capillary interface. Oxygen from inhaled air diffuses across the thin walls of the alveoli into the surrounding capillaries and binds to hemoglobin in red blood cells. This oxygen-rich blood is then transported to every tissue in the body. The lungs are the organ that actually oxygenates the blood, whereas the heart pumps the oxygenated blood to the body, and the brain or stomach simply receive blood that has already been oxygenated.

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