Ncert Exercises & Solutions

Q 3 For completion of respiration process, write the given steps in sequential manner

(a) Diffusion of gases (O₂ and CO₂) across alveolar membrane.
(b) Transport of gases by blood.
(c) Utilisation of O₂ by the cells for catabolic reactions and resultant
release of CO₂
(d) Pulmonary ventilation by which atmospheric air is drawn in and CO₂
rich alveolar air is released out.
(e) Diffusion of O₂ and CO₂ between blood and tissues.

(d) Pulmonary ventilation by which atmospheric air is drawn in and CO₂ rich alveolar air is
released out.
(a) Diffusion of gases ( O₂ and CO₂) across alveolar membrane.
(b) Transport of gases by blood.
(c) Diffusion of O₂ and CO₂ between blood andtissues.
(e) Utilisation of O₂ by the cells for catabolic reactions and resultant release of carbondioxide.

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