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In our body's heart, the Heart Conduction System is an impulse-conducting system composed of modified cardiac muscles.

Heart Conduction System Components
In our body's heart, the Heart Conduction System includes several components beginning with the sinoatrial node, without any neural stimulation, it rhythmically initiates impulses 70 to 80 times per minute, establishing the basic rhythm of the heartbeat; other components coordinate the contraction and relaxation of the heart chambers including atrioventricular node, atrioventricular bundle (bundle of His), bundle branches, and conduction myofibers. *