What’s Heart Anatomy?
The heart is a muscular organ roughly the size of a fist, located in the chest cavity between the lungs, and functions as the body’s pump for circulating blood. It consists of four chambers: the right atrium and right ventricle, which receive deoxygenated blood from the body and pump it to the lungs, and the left atrium and left ventricle, which receive oxygenated blood from the lungs and distribute it to the body. The heart’s structure includes valves (tricuspid, pulmonary, mitral, and aortic) that ensure unidirectional blood flow, as well as specialized tissues such as the sinoatrial node and atrioventricular node that regulate heartbeats. The heart is encased in a protective double-layered membrane known as the pericardium.