Question

Exchange of gases between the blood and the tissues of the body takes place by which of the following mechanism?

• A. External respiration
• B. Internal respiration
• C. Cellular respiration
• D. Counter-current exchange

Answer 1

The correct option is B

Internal respiration

The process of movement of substances from a region of higher concentration to a region of lower concentration is called diffusion. It is the process by which exchange of gases take place between blood and body tissues.