Question

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Question_


1) Why does the breathing rate increases after physical activity?​

Answer 1

Answer:

Explanation:

When you exercise and your muscles work harder, your body uses more oxygen and produces more carbon dioxide. To cope with this extra demand, your breathing has to increase from about 15 times a minute when you are resting, up to about 40–60 times a minute during exercise.

Answer 2

Answer:

it is mainly because when you do any physical activity your muscles always work harder and gives out a lot of carbon dioxide and our body will need more oxygen .