Zoology-Gas Exchange
NEET Zoology Gas Exchange MCQ Question
Type: MCQ-diagram based-Hard-Class 11
A diagram shows a cross-section of the thoracic chamber with labeled parts including the vertebral column, sternum, ribs, and diaphragm. Which part of the respiratory system is the primary site for the actual diffusion of oxygen and carbon dioxide?
A
Alveoli
B
Bronchi
C
Trachea
D
Pleural membrane
Correct Answer
Option A
Detailed Explanation
The alveoli form the respiratory or exchange part of the respiratory system and are the site of actual diffusion of O2 and CO2 between blood and atmospheric air, as described in Chunk 4 of the NCERT context.
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