What are Alveoli in the respiratory system?

What are Alveoli in the respiratory system?
  1. Structures responsible for diffusion of gases in the body
  2. Sites for exchange of oxygen and carbon dioxide
  3. Structures involved in the production of mucus
  4. Centers for processing of air inhaled

Solution

Alveoli are the primary sites in the respiratory system where oxygen and carbon dioxide are exchanged through diffusion, primarily based on pressure/concentration gradient.

Asked in: NCERT

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