![]() The two exceptions to these are the pulmonary arteries and pulmonary veins, as well as the umbilical artery and vein. Whereas veins bring deoxygenated blood back into the heart, those that carry oxygenated blood away from the heart to other tissues in the body are known as arteries. ![]() The smooth functioning of the circulatory system is maintained by a complex network of blood vessels that circulate blood throughout the body and back to the heart. The heart consists of four chambers, four one-way valves, and a set of arteries and veins that regulate the normal flow of blood within the body. ![]() Image Credit: Explode / How blood circulates in the heart Typically, the heart is the size of an adult fist and is found enclosed in a pericardial sac at the chest's center, tilted to the left, and underneath the sternum in a thoracic compartment. The heart is a vital organ of the body therefore, minute dysfunctions or abnormalities in the heart may have drastic consequences on human health. The heart and a network of arteries and veins comprise the cardiovascular system. Reviewed by Benedette Cuffari, M.Sc.Īs the central part of the circulatory system, the heart is responsible for pumping blood, supplying oxygen and nutrients, and removing metabolic waste such as carbon dioxide from all the tissues in the body.
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