Watch Inside the Living Body (2007) : Full Movie Online Free Take a fascinating journey inside the bizarre world of a living human being with this compelling documentary from National Geographic, where microscopic cameras and other state-of-the-art technologies reveal perspectives that will blow your mind. Tracking the body of a female from infancy to old age, viewers will observe the digestion of a meal, the development of the cardiac system and other mesmerizing aspects of the body's inner workings.