Blood flow in the heart is done by the contraction of the heart muscle.
The cardiac cycle is divided into two periods:
Diastole - The ventricle muscle is relaxed
Systole - The ventricle muscle is contracted
The circulation of blood can be divided into two cycles: the Systemic Cycle and the Pulmonary Cycle.
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The heart consists of four chambers:
Right and Left Atrium, and the Right and Left Ventricles.
The Atrium is connected to Ventricles via valves and the right and left sides are separated by a septum.
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