External Respiration Refers To

Question

External respiration refers to
A) atmospheric air coming into the lungs.
B) gas exchange between the lungs and the blood.
C) gas exchange in the atmosphere.
D) gas exchange between the blood and body tissues.
E) cellular respiration.

Accepted Answer

External respiration refers to the exchange of gases between the lungs and the blood. This includes oxygen entering the blood from the lungs and carbon dioxide leaving the blood to be expelled from the body through exhalation.