Heart.rar

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

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

Your heart functions as a dual-pump system that never stops, beating approximately : A natural "pacemaker" called the sinoatrial (SA) node

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: Heart.rar