Heart.rar

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 Heart.rar

Receives deoxygenated blood from the body and pumps it to the lungs. The heart is a fist-sized muscular organ located

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

The right and left ventricles pump blood out of the heart.