Question

the functional units of the respiratory system that provide for the exchange of gases are the
a. bronchioles
b. lobar areas
c. lobules
d. alveoli

Explanation:

Alveoli are small air - filled sacs in the lungs. They have a large surface area and thin walls. This structure allows for efficient gas exchange (oxygen and carbon dioxide) between the air in the alveoli and the blood in the capillaries surrounding them. Bronchioles are small airways that lead to the alveoli but do not directly participate in gas exchange. Lobar areas and lobules are larger anatomical divisions of the lungs and are not the functional units for gas exchange.

Answer:

D. alveoli