re of the HeartThe heart can be found at the center of the CHEST, underneath the sternum in a thoracic compartment. It is made up of FOUR chambers and several valves that regulate the normal flow of blood within the body.Two chambers called ATRIA are located in the upper portion of the heart and receive oxygen-free blood. The valves that separate these chambers are called atrioventricular valves which is composed of the tricuspid valve on the left and the mitral valve on the right.On the other hand, ventricles are chambers found on the lower portion of the heart; they pump oxygen-enriched blood into all organs of the body, reaching even the smallest cells. Similar to the atria, the VENTRICULAR chambers are also separated by valves. Collectively-termed as semilunar valves, these are comprised of the pulmonary and aortic valve.The functions are hereThe heart is a pump, which moves the blood. The arteries and veins are the pipes through which the blood flows. The lungs provide a place to exchange carbon DIOXIDE for oxygen. The heart is a hollow, muscular organ, which functions as a pump for the movement of blood through the body.