The blood leaving the tissues becomes richer in

Options

A. carbon dioxide
B. water
C. heamoglobin
D. oxygen

Answer

A

Explanation

The blood leaving the tissues becomes richer in `CO_(2)`. The main artery (aorta) carries oxygenated blood to all the organs of the body from the heart. When the oxygenated blood passes through the capillaries of the body orans/tissues, it gives oxygen to the body cells.
At the same time, carbon dioxide produced during respiration enters into blood. Thus, deoxygenated blood (carrying `CO_(2)`) leaves the tissues and enters the vena cava, from where they are again passed to lungs for oxygenation.