How do our muscles translate electrical and chemical energy into mechanical force? How does our immune system destroy microscopic invaders? How is the stomach protected from its own lethal hydrochloric acid?
Through the use of fiber optic cables and special cameras, this documentary travels inside the body to answer these questions and to reveal the details of our muscular, immune, digestive, and reproductive systems. Featuring 3-D computer animations and never-before-seen footage of microscopic events, this program follows functions such as the digestive process and the immune system's response to invading bacteria.
In addition, interviews and footage showing four famous athletes in action demonstrate the links between internal functions and external physical performance and health.