plan a investigation to show how your pulse rate changes with excercise and predict what you think will happen in your experiment
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do it by yourself
Explanation:
during exercise our body need more energy and for that our cells have to do more works in terms of breaking down of glucose and for that cell requires more oxygen. To provide more oxygen yo cell our breathing rate increase as well as our heart beat also increase so that oxygen would reach upto the cell more rapidly and in good enough amount.
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