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Your heart functions as a dual-pump system that never stops, beating approximately :

Four valves (tricuspid, pulmonary, mitral, and aortic) act as one-way gates to keep blood flowing in the correct direction. ⚙️ How the "System" Works Heart.rar

Receives oxygen-rich blood from the lungs and pumps it out to the rest of the body. Your heart functions as a dual-pump system that

A natural "pacemaker" called the sinoatrial (SA) node sends electrical impulses that tell the heart muscles when to contract. 📊 Heart Rate: The Vital Metric All About Heart Rate | American Heart Association beating approximately : Four valves (tricuspid