Nervous System of Humans :

The human body is controlled by a network of living wires called nervous system. While man made wires wires carry power, the cells that make up the nervous system carry information. 

     The brain, nerves and sense organs make up the body's nervous system. The nervous system carries information around the body in the form of electrical signals. The various parts of the system are in constant communication and continually active. Message stream into the from the senses every split second. At the time, the brain coordinates the exact tension of hundreds of muscles around the body, from the tiny muscles that moves the eyes to the large muscles needed for running.  

    Your nervous system makes it possible for you to react to the world with the lightening speed. Every moment , electrical signals from your senses shoot along your nervous, racing towards your brain at up to 400 kph (250 mph). Your brain analysis the flood of upcoming information, decides how to respond, and sends outgoing signals to muscles and other organs, telling them what to do. Much of your nervous system work automatically, controlling your internal organs and reflexes without your conscious awareness. A nerve signal takes only 0.01 seconds to travel from your brain to your toe.