Respiration
Primary site of gaseous exchange in human lungs is:
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About This Question
- Subject
- biology
- Chapter
- human physiology
- Topic
- respiration
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
Alveoli
- Structure of Respiratory System: Air travels through the trachea, bronchi, and bronchioles to reach the deep lung tissue.
- The Alveoli: These are tiny, thin-walled, balloon-like air sacs at the end of the respiratory tree.
- Function: The alveoli are the primary sites for the exchange of gases (O2 and CO2) between the inhaled air and the blood in the surrounding pulmonary capillaries.
- Mechanism: Gaseous exchange occurs across the alveolar-capillary membrane purely by diffusion.
This easy difficulty biology question is from the chapter human physiology, covering the topic of respiration. It appeared in the 2025 exam.
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