The phase of the cardiac cycle in which the ventricles contract is called what?

The phase of the cardiac cycle in which the ventricles contract is called what?

• A. Diastole
• B. Systole
• C. Isovolumetric contraction
• D. Atrial kick

Answer: (B)

During systole, the ventricles contract, raising their pressure and pushing blood into the aorta and pulmonary artery. This is the phase of the cardiac cycle when the ventricles actively contract to eject blood. Diastole is the relaxation and filling phase, while isovolumetric contraction is the brief interval at the start of systole when the ventricles contract but no blood is yet ejected because all valves are closed. Atrial kick is the final contraction of the atria that helps complete ventricular filling during diastole. So the correct phase for ventricular contraction is systole.

During systole, the ventricles contract, raising their pressure and pushing blood into the aorta and pulmonary artery. This is the phase of the cardiac cycle when the ventricles actively contract to eject blood. Diastole is the relaxation and filling phase, while isovolumetric contraction is the brief interval at the start of systole when the ventricles contract but no blood is yet ejected because all valves are closed. Atrial kick is the final contraction of the atria that helps complete ventricular filling during diastole. So the correct phase for ventricular contraction is systole.