The document provides information about the structure and function of the human heart. It is divided into sections on the right heart and left heart. The right heart receives deoxygenated blood from the body and pumps it to the lungs. The left heart receives oxygenated blood from the lungs and pumps it out to the body through the aorta to sustain the circulatory system. Key components include the right and left atria and ventricles, tricuspid and mitral valves, and major blood vessels like the vena cavae, pulmonary artery and veins, and aorta.