Beakman explains that nerves are responsible for our five senses. He uses an animated clip to explain how nerves are responsible for bringing in environmental cues and relaying that information to the brain.
Beakman explains that our nervous system is responsible for sensing pain. He uses a schematic to show the nervous system in the body and explains the traveling of signals from the neurons to the brain and back. Lester the rat hurts his tail and there is a slight delay from the event happening and your reaction (about 2 seconds).