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

The heart is the central organ in the circulatory system, responsible for pumping blood throughout the body. It delivers oxygen and nutrients to tissues and removes waste products like carbon dioxide. The heart consists of four chambers: two atria and two ventricles. Oxygenated blood is pumped from the lungs into the left side of the heart, which then sends it to the rest of the body. The right side of the heart pumps deoxygenated blood to the lungs for oxygenation. This constant flow of blood is vital for maintaining homeostasis and supporting life functions.