As the heart beats, it pumps blood through a system of blood vessels, called the circulatory system. The vessels are elastic, muscular tubes that carry blood to every part of the body.

Learn about the anatomy of the heart and how its chambers, valves, and vessels work together to maintain effective blood circulation throughout the body to sustain life.

A year after doctors at Duke Health transplanted some valves and arteries into the heart of a sick child, they announced success on Tuesday in the Journal of the American Medical Association.