The primary function of the pulmonary system is best described as the:
A) intake and expelling of air.
B) exchange of gases between the environment and blood.
C) movement of blood into and out of the capillaries.
D) principle mechanism for cooling of the heart.

Question

Quizplus · Accepted Answer

The pulmonary system, specifically the lungs, is responsible for the exchange of gases (oxygen and carbon dioxide) between the environment and the blood. The intake and expelling of air (A) is certainly necessary for this process, but it is not the primary function. Movement of blood into and out of the capillaries (C) is more specifically related to the cardiovascular system, and the pulmonary system is not the principle mechanism for cooling of the heart (D).

The Primary Function of the Pulmonary System Is Best Described