The circulatory system of bear is closed system composed veins, arteries , capillaries , and the main organ the heart. This animal is primarily on land meaning that it gets of the vital oxygen into the body in order for the body to perform like it is needed to perform. For example when it chasing after a fish it has to pump it's heart in order to be able to move and catch the body and once he bites the vital nutrients are sucked into the bloodstream and the nutrients are sent throughout the body.