Question

Pulmonary respiration is

• A. External
• B. Internal
• C. Cellular
• D. All of the above

Answer 1

The correct option is A External

External respiration is basically the transfer of gas between respiratory organs such as lungs and blood in pulmonary capillaries. External respiration, also known as breathing, refers to a process of inhaling oxygen from the air into the lungs and expelling carbon dioxide from the lungs to the air. In external respiration, gas exchange takes place between the alveoli and the blood.

Thus, the correct answer is option A.