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The human body is made up of many different systems that work together to keep us alive and healthy. The circulatory system, also known as the cardiovascular system, is one of these vital systems. It consists of the heart, blood vessels, and blood itself. The heart is a muscular organ located in the chest that pumps blood throughout the body. Arteries are blood vessels that carry oxygenated blood away from the heart to the rest of the body. Veins, on the other hand, return deoxygenated blood back to the heart. The circulatory system also includes the capillaries, which are tiny blood vessels that allow for the exchange of oxygen and nutrients with the cells of the body.