The relaxation of the ventricles is known as which phase?

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Multiple Choice

The relaxation of the ventricles is known as which phase?

Explanation:
The ventricles relax during diastole. This is the phase of the cardiac cycle when the heart muscle unwinds, pressure falls, and the ventricles fill with blood as the atrioventricular valves open. Atrial contraction (atrial systole) can contribute a final push to fill the ventricles, but the overall relaxation phase for the ventricles is diastole. Systole is the pumping (contraction) phase, isovolumetric relaxation is a brief part of diastole with all valves closed and no volume change, and atrial systole is the contraction of the atria, not the ventricles.

The ventricles relax during diastole. This is the phase of the cardiac cycle when the heart muscle unwinds, pressure falls, and the ventricles fill with blood as the atrioventricular valves open. Atrial contraction (atrial systole) can contribute a final push to fill the ventricles, but the overall relaxation phase for the ventricles is diastole. Systole is the pumping (contraction) phase, isovolumetric relaxation is a brief part of diastole with all valves closed and no volume change, and atrial systole is the contraction of the atria, not the ventricles.

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