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MCQ
Which epithelium lines the air sacs of the lungs and inner surfaces of blood vessels, allowing easy diffusion?
Unit-5 Tissues Organs and Organ Systems
A Squamous epithelium
B Columnar epithelium
C Cuboidal epithelium
D Ciliated epithelium
Explanation

Thin squamous epithelium allows rapid exchange of substances such as oxygen and carbon dioxide.

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