What is the role of the heart in the circulatory system?

The heart is a muscular organ responsible for pumping blood throughout the circulatory system. It delivers oxygen and nutrients to tissues while removing carbon dioxide and other waste products. The heart has four chambers: two atria and two ventricles, which work in a coordinated rhythm to circulate blood. The right side pumps deoxygenated blood to the lungs, while the left side pumps oxygenated blood to the rest of the body. Maintaining a healthy heart is crucial for overall health, as it ensures efficient blood flow and supports all bodily functions.