Where within the respiratory system does the exchange of gases, or diffusion, occur?
A)Larynx
B)Bronchioles
C)Alveoli
D)Alveolar sacs

Question

Quizplus · Accepted Answer

The actual exchange of gases within the respiratory system occurs in the Alveolar sacs. These are the smallest structure within the lungs, and it is here that the exchange of oxygen and carbon dioxide occurs, passing these gases into or out of the bloodstream.

Where Within the Respiratory System Does the Exchange of Gases