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Breathing and Exchange of Gases — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYBreathing and Exchange of Gases5 Marks
Question
Explain various steps of respiration.
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Answer

Steps of Respiration:
  1. Breathing or pulmonary ventilation by which atmospheric air is drawn in and Co2, rich alveolar air is released out.
  2. Diffusion of gases (O2, and CO2) across alveolar membrane.
  3. Transport of gases by the blood.
  4. Diffusion of O2, and CO2, between blood and tissues.
  5. Utilisation of O2, by the cells for catabolic reactions and resultant release of CO2.

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