The Human Respiratory System · NCERT Biology

What is the primary function of the 'conducting part' of the respiratory system?

  1. Diffusion of oxygen and carbon dioxide
  2. Clearing the air of foreign particles and humidifying it
  3. Actual exchange of gases between blood and atmospheric air
  4. Production of pleural fluid
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Correct answer: Clearing the air of foreign particles and humidifying it

The conducting part transports atmospheric air to the alveoli, clears it from foreign particles, humidifies it, and also brings the air to body temperature. It includes the external nostrils up to the terminal bronchioles.

Difficulty: Medium Question 4 of 20

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