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.

Question

Quizplus · Accepted Answer

External respiration refers to the gas exchange that occurs between the lungs and the blood. Oxygen is taken up by the blood in the lungs, while carbon dioxide is released from the blood into the lungs to be exhaled out of the body.

External Respiration Refers to