The Blood Air Barrier Consists Of

Question

The blood air barrier consists of
A) pseudostratified ciliated columnar epithelium.
B) 1 layer of moist cuboidal epithelium.
C) 2 layers of simple squamous epithelium.
D) stratified squamous epithelium.
E) surfactant cells.

Accepted Answer

The blood air barrier is a specialized structure in the lungs that allows for gas exchange between the alveoli and capillaries. It consists of two layers of simple squamous epithelium, which are very thin and allow for efficient diffusion of gases. Pseudostratified ciliated columnar epithelium, moist cuboidal epithelium, and stratified squamous epithelium are not found in the blood air barrier. Surfactant cells are present but are not the primary component of the barrier.