Question

describe the mechanism of breathing in human beings.
¡) under normal condition what is the rate of breathing per minute .
¡¡) why does the rate of breathing increases by 20 to 25 times during vigorous exercise.

Answer 1

Anaerobic and aerobic..

Answer 2

1 - under normal conditions it is 15 to 18 times per minute

2 - because at the time of exercise the demand of oxygen increases

Hope it helps!!

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