Q. Which part of the respiratory system is the site of gas exchange?

  • (A) Bronchi
  • (B) Alveoli
  • (C) Trachea
  • (D) Larynx
✅ Correct Answer: (B) Alveoli
Explanation: Alveoli have thin walls that allow oxygen and carbon dioxide to diffuse.

Published by Uday Singh ⭐ 8.97K Points at 05-Dec-2025 08:10 pm in Biology

Explanation by: Uday Singh
Alveoli have thin walls that allow oxygen and carbon dioxide to diffuse.

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