The contraction cycle of the heart is the series of events


The contraction cycle of the heart is the series of events that occurs during one heartbeat. Each beat of the heart includes the contraction (systole) and relaxation (diastole) of the atria and then the ventricles. Let's begin the examination of this cycle by discussing electrical conduction through the heart.

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Biology: The contraction cycle of the heart is the series of events
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