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Answer:

Breathing rate increases to provide the body (exercising muscles) with oxygen at a higher rate. Heart rate increases to deliver the oxygen (and glucose) to the respiring muscles more efficiently

Ardhana
When we have recorded the pules,ECG,and respiratory activity simultaneously and consistently olserved the respiratory sinus arrhythmia in all cycles of respiration of all the subjects in the form of increase heart rate during inspiratory phase and decrease heart rate during expiratory phase.


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