Heart.rar -

Receives oxygen-rich blood from the lungs and pumps it out to the rest of the body.

The right and left atria receive incoming blood. Heart.rar

Four valves (tricuspid, pulmonary, mitral, and aortic) act as one-way gates to keep blood flowing in the correct direction. ⚙️ How the "System" Works Receives oxygen-rich blood from the lungs and pumps

Receives deoxygenated blood from the body and pumps it to the lungs. ⚙️ How the "System" Works Receives deoxygenated blood

The heart is a fist-sized muscular organ located in the center of your chest, slightly behind and to the left of the breastbone. It is divided into four main chambers:

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

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