Given what we know we can confirm that the correct sequence of events for the cardiac cycle is atrial systole, ventricular systole, atrial diastole and ventricular diastole.
The cardiac cycle is what we define as the cycle in which the heart beats. This cycle begins with the systole of both the atria and the ventricles, in which they contract, first the atria, then the ventricle. This is to pump blood into the next part of the circulatory tract. This is followed by the diastole of each cavity, in which they fill with blood once more.
Therefore, we can confirm that the correct sequence of events for the cardiac cycle is atrial systole, ventricular systole, atrial diastole, and ventricular diastole.
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The correct sequence of events of the cardiac cycle is :
Ventricular filling ---> isovolumetric contraction ---> ventricular ejection --> isovolumetric relaxation
Cardiac cycle is a measure of the heart performance start form a single beat to the beginning of the next heartbeat. it occurs in four phases which starts with the Ventricular filling phase and ends with the isovolumetric relaxation.
Hence we can conclude that the correct sequence of events of cardiac cycle is as listed above.
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