Question

Exchange and diffusion in the body occurs in the capillaries only​

Answer 1

Answer:

During gas exchange oxygen moves from the lungs to the bloodstream. At the same time carbon dioxide passes from the blood to the lungs. This happens in the lungs between the alveoli and a network of tiny blood vessels called capillaries, which are located in the walls of the alveoli.

Diffusion, the most widely-used mechanism, allows the flow of small molecules across capillaries such as glucose and oxygen from the blood into the tissues and carbon dioxide from the tissue into the blood. ... Bulk flow is used by small, lipid-insoluble solutes in water to cross the the capillary wall.