Question

Sectional view of alveoli with a pulmonary capillary is shown below. Identify the right match in context to the options given below:

• A. i: Basement membrane, ii: Endothelium
• B. i:Endothelium, ii: Basement membrane
• C. i: Squamous epithelium of alveoli, ii: Endothelium
• D. i: Endothelium, ii: Squamous epithelium of alveoli

Answer 1

Answer: (A)

Basement membrane:The basement membrane is a sheet of proteins and other substances to which epithelial cells adhere and that forms a barrier between tissues.
Squamous epithelium: Alveoli is lined by a simple squamous epithelium which is thin and facilitate the process of diffusion of oxygen and $C{O}_2$ .
Endothelial cells form a one-cell thick walled layer called endothelium that lines all of blood vessels.