Students in a histology class are assigned to identify regions of the lung. The slide shows a basement membrane, capillary lumen, and macrophages. They are looking at the:
A) trachea.
B) bronchioles.
C) alveoli.
D) bronchus.

Question

Quizplus · Accepted Answer

The presence of a basement membrane, capillary lumen, and macrophages is indicative of the alveoli, which are the primary site of gas exchange in the lungs. The trachea and bronchi are larger airways that do not have capillaries and alveolar sacs. The bronchioles are smaller airways, but they also lack the characteristic basement membrane, capillaries, and macrophages seen in the alveoli.

Students in a Histology Class Are Assigned to Identify Regions