Which of the following structures allow the exchange of gases between the inhaled air and the blood?
A)the alveoli and the alveolar ducts only
B)the alveoli, the bronchioles, and the alveolar ducts
C)the alveoli only
D)the alveoli and the bronchioles only

Question

Quizplus · Accepted Answer

The alveoli are the primary site for gas exchange in the respiratory system. The bronchioles are responsible for directing air to the alveoli, but they do not directly participate in gas exchange. The alveolar ducts are a part of the pathway leading to the alveoli, but they do not exchange gases themselves.

Which of the Following Structures Allow the Exchange of Gases