Final answer:
The phase of the cardiac cycle when the heart is expanding and refilling is called diastole. Diastole is the relaxation phase of the cardiac cycle, during which the chambers of the heart fill with blood. It is an important phase that allows for the heart to rest and recharge before the next contraction.
Step-by-step explanation:
The phase of the cardiac cycle when the heart is expanding and refilling is called diastole. Diastole is the relaxation phase of the cardiac cycle, during which the chambers of the heart fill with blood. It is an important phase that allows for the heart to rest and recharge before the next contraction.
phase of the cardiac cycle when the heart is expanding and refilling is called diastole. Diastole is the relaxation phase of the cardiac cycle, during which the chambers of the heart fill with blood. It is an important phase that allows for the heart to rest and recharge before the next contraction.