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  • The blood leaving the tissues becomes richer in (a) carbon dioxide (b) water (c) heamoglobin (d) oxygen

The blood leaving the tissues becomes richer in

(a) carbon dioxide
(b) water
(c) hemoglobin
(d) oxygen

Answers (1)

Blood leaving the tissue is enriched with carbon dioxide. The aorta carries oxygenated blood from the heart to the organs. When this blood passes through the capillaries of body organs, it gives oxygen to the body cells.
Hence, the blood that reaches the tissue is enriched with oxygen, which is absorbed by the tissue, and the carbon dioxide from the cell is exchanged for oxygen.
Deoxygenated blood (carrying CO2) leaves the tissues and enters the vena cava, which is then passed to the lungs for oxygenation. Hence, (a) is the correct option.

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