In this program, world-renowned anatomist Gunther von Hagens takes viewers into the inner workings of the respiratory and circulatory systems—exposing the path that oxygen takes through the human body. Von Hagens dissects lung tissue to reveal alveoli, delves into the atria and ventricles of the heart, and examines the intricate network of blood vessels that spreads through the abdomen, limbs, digestive system, head, and brain. Clearly explaining terms such as vena cava, pericardium, iliac artery, and other circulatory concepts, von Hagens also illustrates the effects of smoking on the lungs and what happens inside the body in cases of emphysema, asthma, pleurisy, arteriosclerosis, and heart attack. Viewer discretion is advised. Contains clinically explicit language and demonstrations. (50 minutes)