CHAPTER 17 B E G
arrangement is essential for breathing, as we cannot directly alter the pulmonary volume. Respiration involves the following steps: (i) Breathing or pulmonary ventilation by which atmospheric air is drawn in and CO 2 rich alveolar air is released out. (ii) Diffusion of gases (O 2 and CO 2) across alveolar membrane. (iii) Transport of gases by ...
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