The nervous system therefore has a tremendous part to play in enabling us to survive in the world.

It can be thought of as the telecommunications system of the body. Sending information from various sources to a vast computer network ( the brain ) which analyses and solves the problems presented to it and then passes the appropriate information out to the field workers ( muscles, glands etc.) enabling the appropriate actions to take place in a co-ordinated and logical fashion,

The nervous system works in close conjunction with another body system known as the endocrine system. This has effects on the body's function by producing organic chemical substances known as hormones,

Taking the analogy above and relating this to the endocrine system, it can be likened to a road & rail network communication system transporting bulk items (hormones) around the body to enable essential works to be carried out.