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 sensory system. He demonstrates how stimuli detected by our senses are brought together by the central nervous system into the most refined way of interacting with the environment of any species on the planet. Dr. Reisman also provides a unique look at the anatomy and physiology of each of these sensory systems and shows how the brain uses them to produce what we call being human.