The alveolar wall in the distal lungs is designed for rapid diffusion of the respiratory gases,O₂,and CO₂ across the alveolar wall.The alveolar wall is composed of
A)adipose tissue.
B)transitional epithelium.
C)dense,fibrous connective tissue.
D)simple squamous epithelium.

Question

Quizplus · Accepted Answer

The alveolar wall is composed of a single layer of simple squamous epithelium, which is specifically designed for the rapid diffusion of respiratory gases across the alveolar-capillary membrane. This thin layer of cells allows oxygen to quickly diffuse into the bloodstream and carbon dioxide to diffuse out of the bloodstream into the lungs for exhalation. The other options, adipose tissue, transitional epithelium, and dense fibrous connective tissue, are not found in the alveolar wall and are not involved in gas exchange.

The Alveolar Wall in the Distal Lungs Is Designed for Rapid