The walls of the alveoli are composed of
A)ciliated columnar epithelium.
B)simple squamous epithelium.
C)stratified squamous epithelium.
D)areolar connective tissue.

Question

Quizplus · Accepted Answer

The alveoli are small air sacs in the lungs where gas exchange occurs between the lungs and the bloodstream. The walls of the alveoli are composed of a single layer of simple squamous epithelium, which allows for efficient diffusion of gases.

The Walls of the Alveoli Are Composed of