MEDICAL PHYSIOLOGY

Detailed explanation-1: -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.

Detailed explanation-2: -The process of exchanging oxygen and carbon dioxide between the alveoli and the blood of the capillaries is called:external respiration.

Detailed explanation-3: -After this, there is an exchange of gases between the lungs and the blood. This is called external respiration. The blood transports the gases to and from the tissue cells. The exchange of gases between the blood and tissue cells is internal respiration.

Detailed explanation-4: -The exchange of oxygen and carbon dioxide between the alveoli and tissues takes place by simple diffusion according to the respective partial pressure gradients.