Life is all about gaseous exchange. Oxygen is required by the cells for all metabolic reactions of the body, so it moves in through the process of breathing in. After metabolism carbon (IV) oxide is released which moves out of the lungs through the process of breathing out. This content will enable the learners to understand the mechanism of breathing in and out and the required structures in the respiratory system for the breathing.
BREATHING MECHANISM IN MAMMALS
Rationale
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