The heart is a muscular organ located in the chest, responsible for pumping blood throughout the body. It consists of four chambers: the right atrium, right ventricle, left atrium, and left ventricle. The heart works continuously, supplying oxygen and nutrients to tissues while removing carbon dioxide and waste products. The heart is part of the circulatory system, which includes blood vessels like arteries and veins. It is controlled by electrical signals that regulate its rhythm and ensure efficient blood flow. Healthy lifestyle choices, such as regular exercise and a balanced diet, can help maintain heart health and prevent diseases like heart disease.