In mammals, gas exchange between the atmosphere and the pulmonary blood occurs in the ________.
A) trachea
B) larynx
C) bronchi
D) bronchioles
E) alveoli

Question

Quizplus · Accepted Answer

Gas exchange between the atmosphere and pulmonary blood occurs in the alveoli, which are small sacs in the lungs where oxygen from the air is diffused into the blood and carbon dioxide from the blood is diffused into the air to be exhaled. The trachea, larynx, bronchi, and bronchioles all play a role in conducting air to and from the alveoli, but gas exchange only occurs in the alveoli.

In Mammals, Gas Exchange Between the Atmosphere and the Pulmonary