What is the relaxed state of the ventricle called?

a. systole

b. diastole

c. ventricular filling

d. ventricular ejection

It is called diastole. In the diastole phase, the heart ventricles are relaxed and the heart fills with blood. In the systole phase, the ventricles contract and pump blood out of the heart and to arteries. One cardiac cycle is completed when the heart chambers fill with blood and blood is then pumped out of the heart.