It looks like a deep and mossy cave, but it is no more than a pore on the human skin, magnified 3,500 times. And what appears to be a coral reef is in fact the tip of the tongue.

The camera watches the movement of the vocal chords; peers down glowing, breathing corridors into the depths of the lungs; and shows us the vibration of tiny bones within the ear so that we actually see sounds being heard. Man's own anatomy has intrigued him through the ages. But now, remarkable camera techniques reveal a startling perspective on how we are made.