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Question

Exchange of gases between the blood and the tissues of the body takes place via:

A
Breathing
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B
Diffusion
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C
Active transport
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D
Counter-current exchange
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Solution

The correct option is B Diffusion
Diffusion in our body is the process by which exchange of gases take place between the blood and body tissues. Respiratory gas is transported to each and every cell by blood. Then the gases, oxygen from blood to tissue fluid and carbon dioxide from tissue fluid to blood, diffuses. The diffusion takes the particular direction due to differences in the concentration of these gases.

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