What is the first step in the process of respiration?

What is the first step in the process of respiration?
  1. Diffusion of gases across alveolar membrane
  2. Breathing or pulmonary ventilation
  3. Transport of gases by the blood
  4. Utilisation of O₂ by the cells

Solution

The first step in the process of respiration is breathing or pulmonary ventilation, which involves drawing in atmospheric air and releasing CO₂ rich alveolar air.

Asked in: NCERT

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