Question

the phenomenon of normal breathing in a human being comprises​

Answer 1

Answer:

of an active inspiratory and a passive expiratory phase

Explanation:

The phenomenon of normal breathing in a human being comprises of an active inspiratory and a passive expiratory phase. During inspiration, muscles of ribs and diaphragm contracts. Hence, it is an active process. During expiration, muscles of ribs and diaphragm relax

Answer 2

Answer:

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