Which of the following is the primary gas exchange site?
A)Trachea
B)Bronchiole
C)Nasal sinuses
D)Alveolus
E)Bronchus

Question

Quizplus · Accepted Answer

The alveolus is the primary gas exchange site in the lungs. Oxygen diffuses from the alveolar air into the capillaries surrounding the alveolus and carbon dioxide diffuses from the capillaries into the alveolar air to be exhaled. The trachea, bronchioles, nasal sinuses, and bronchi are all involved in air movement but do not participate in gas exchange.

Which of the Following Is the Primary Gas Exchange Site