The period of contraction is called systole. Diastole could be the more time of The 2 phases to make sure that the heart can relaxation among contractions. In general, the rate of heartbeat may differ inversely With all the sizing in the animal. In elephants it averages twenty five beats https://horacey603qaj8.activablog.com/36002010/new-step-by-step-map-for-4200-loan