Question

Exchange of gases between the blood and the tissues of the body takes place by .

• A. osmosis
• B. diffusion
• C. active transport
• D. absorption

Answer 1

The correct option is B diffusion

The exchange of gases takes place between the millions of alveoli in the lungs and the capillaries that envelop them. Inhaled oxygen moves from the alveoli to the blood in the capillaries and carbon dioxide moves from the blood in the capillaries to the air in the alveoli. This exchange occurs by the process of diffusion.