NEET PG DENTAL EXAM

Detailed explanation-1: -Pulmonary gas exchange takes place in the lungs between the alveoli and the blood. It is also referred to as external respiration as it involves the respiratory processes that have contact with the external environment.

Detailed explanation-2: -External respiration, also known as breathing, involves both bringing air into the lungs (inhalation) and releasing air to the atmosphere (exhalation).

Detailed explanation-3: -External respiration occurs in the lungs where oxygen diffuses into the blood and carbon dioxide diffuses into the alveolar air. Internal respiration occurs in the metabolizing tissues, where oxygen diffuses out of the blood and carbon dioxide diffuses out of the cells.

Detailed explanation-4: -External respiration is the exchange of gases with the external environment, and occurs in the alveoli of the lungs. Internal respiration is the exchange of gases with the internal environment, and occurs in the tissues.