Heart.rar · Must Watch

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

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

The right and left ventricles pump blood out of the heart. Four valves (tricuspid, pulmonary, mitral, and aortic) act

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: The heart is a fist-sized muscular organ located

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.

Receives deoxygenated blood from the body and pumps it to the lungs.