Tissues: Epithelial, Connective, Muscular, Nervous · Zoology

Which type of epithelial tissue lines the air sacs (alveoli) of the lungs and is specialized for rapid diffusion?

  1. Simple squamous epithelium
  2. Simple cuboidal epithelium
  3. Stratified squamous epithelium
  4. Pseudostratified columnar epithelium
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Correct answer: Simple squamous epithelium

Simple squamous epithelium consists of a single layer of flattened cells, providing a minimal barrier for the exchange of gases. This structure is ideal for the alveoli where oxygen and carbon dioxide must diffuse quickly.

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