Question

Squamous epithelium occurs in the inner lining of:

• A. Kidney
• B. Pancreatic duct
• C. Lung alveoli
• D. Heart

Hint:

Simple squamous epithelium is found where rapid diffusion is needed, such as:
Lung alveoli
Blood capillaries
Bowman's capsule Structure is always linked to function.

Answer 1

The Correct Option is C

Step 1: Recall the function of squamous epithelium. Squamous epithelium is made up of thin, flat cells and is specially adapted for:
diffusion,
filtration,
exchange of gases.
Step 2: Examine each option.
Kidney: Tubules are lined by cuboidal epithelium.
Pancreatic duct: Lined mainly by cuboidal/columnar epithelium.
Lung alveoli: Lined by simple squamous epithelium to allow rapid diffusion of \(O_2\) and \(CO_2\).
Heart: Inner lining (endocardium) is specialized endothelium, not generally cited in this context.
Step 3: Identify the correct structure. Since gas exchange requires a very thin lining, squamous epithelium is characteristically found in lung alveoli.
Hence, the correct answer is \[ \boxed{\text{Lung alveoli}} \]