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Chapter 5.2 ­ The Cardiac Cycle ­ Notes

The heart undergoes the cardiac cycle, which occurs around 70 times each minute,
when at rest. There are two phases to the beating of the heart, contraction (systole)
and relaxation (diastole). Contraction occurs separately in the ventricles and the atria,
so is…

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blood flow through. When pressure is greater on the concave side, blood collects,
pushing the valves together, this prevents the passage of blood.

Cardiac Output:
The volume of blood pumped by one ventricle in one minute. It is dependant on two
factors, the heart rate and the stroke volume.


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