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The human heart is a vital organ that pumps blood throughout the body, supplying oxygen and nutrients while removing carbon dioxide and waste products. Here are some key points about the human heart:

Anatomy: The heart has four chambers: two upper atria and two lower ventricles. The right side pumps deoxygenated blood to the lungs, while the left side pumps oxygenated blood to the rest of the body.
Valves: There are four main valves (tricuspid, pulmonary, mitral, and aortic) that ensure unidirectional blood flow through the heart and prevent backflow.
Circulation: The heart is part of the circulatory system, which includes the pulmonary circuit (to and from the lungs) and the systemic circuit (to and from the rest of the body).
Electrical System: The heart has its own electrical system, including the sinoatrial (SA) node, which acts as the natural pacemaker, regulating the heartbeat.
Health: Maintaining heart health is crucial, as cardiovascular diseases are leading causes of morbidity and mortality. Lifestyle factors such as diet, exercise, and avoiding smoking play a significant role in heart health.
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