circulatory system
(sir-kyoo-la-tor-ee sis-tim)
The system that contains the heart and the blood vessels, and moves blood throughout the body. The circulatory system delivers oxygen and nutrients to the tissues. It also helps the tissues get rid of waste products. The lymph system, which connects with the blood system, is often considered part of the circulatory system.
Audio contributed by: Marisa Weiss, M.D.