Which event marks the beginning of the cardiac cycle?

Name: Which event marks the beginning of the cardiac cycle?
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Question

Quizplus · Accepted Answer

The beginning of the cardiac cycle is marked by the contraction of the atria, called atrial systole, which fills the ventricles with blood. This is immediately followed by ventricular systole, where the ventricles contract to push the blood out of the heart. Therefore, the correct answer is E) atrial systole.

Which Event Marks the Beginning of the Cardiac Cycle