Using the most advanced medical imaging, 3-D graphics and cadaver footage, world renowned surgeon, Dr. Mark Riesman, guides the viewer through the anatomy, physiology, and evolution of the human digestive and renal system. He provides a unique look at the anatomy and physiology of the many organs and structures of digestion, and explains the processes of metabolism. The detailed analysis includes a description of miraculous sequence of mechanical and chemical processes that occur as food is converted into nutrients to sustain all the body's activities. The section titled "Internal Disorders", demonstrates a typical medical examination for a person complaining of stomach ache.