Posts Tagged: Human Heart

Achey Breaky Heart- The Cardiac Conduction System

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The Cardiac Conduction System Sino-Atrial [SA] node or primary pacemaker – cells that generate an electrical current. Atrioventricular [AV] node or secondary pacemaker- receives the electrical impulse. Cardiac muscle action potentials– SA-AV electrical activity causes the right atrium to contract. Heartbeat -the result of cardiac muscle action potential, travelling throughout the heart. Intrinsic heart rate: […]