Facts About the Nervous System

  If you were to line up all of the 100,000,000,000 neurons in your
   brain, they would stretch across 600 miles.

  The fastest nerves in your body send electrical messages to your
    brain at more than 200 miles per hour.

  The left side of your brain controls the right side of your body, and
    vice versa.

  Invertebrates like sea anemones evolved the first basic nervous
    systems.