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CBSE Class 10 Answered

Why does our heart beat faster when we excercise.
Asked by somyap | 18 Apr, 2010, 06:06: AM
Expert Answer

The rate of breathing increases during vigorous exercise. This is because the body needs more energy which can be released only if greater amounts of oxygen reach the cells. But more oxygen can reach the cells only if more blood reaches the cells. Hence heart has to pump more blood due to which it begins to beat faster.

 

Kindly post each query separately.

 

Answered by | 18 Apr, 2010, 08:00: AM
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