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Anatomy of the Heart



Systole Phase


The cardiac cycle is the sequence of events that occur when the heart beats. There are two phases of this cycle:

Cardiac Cycle Systole Phase

Systole
Contraction passes from AV node to
Purkinje fibers and ventricular cells.

Ventricles contract.

Atrioventricular valves close.

Semilunar valves open.

Blood is pumped from the ventricles
to the arteries.





Cardiac Cycle


Cardiac Conduction


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