Changes

[[File:lighterstill.jpg]][[File:Nervous_system.jpg|right|frame]]

[[File:lighterstill.jpg]][[File:Nervous_system260.jpg|right|frame]]

The '''nervous system''' is a network of specialized [[cells]] that coordinate the [[actions]] of an [[animal]] and send signals from one part of its [[body]] to another. These cells send signals either as electrochemical [[waves]] traveling along thin fibers called [http://en.wikipedia.org/wiki/Axon axons], or as [[chemicals]] released onto other cells. The nervous system is composed of [http://en.wikipedia.org/wiki/Neuron neurons] and other specialized cells called [http://en.wikipedia.org/wiki/Glial_cells glial cells] (plural form glia).

The '''nervous system''' is a network of specialized [[cells]] that coordinate the [[actions]] of an [[animal]] and send signals from one part of its [[body]] to another. These cells send signals either as electrochemical [[waves]] traveling along thin fibers called [http://en.wikipedia.org/wiki/Axon axons], or as [[chemicals]] released onto other cells. The nervous system is composed of [http://en.wikipedia.org/wiki/Neuron neurons] and other specialized cells called [http://en.wikipedia.org/wiki/Glial_cells glial cells] (plural form glia).