Changes

[[Image:neurondiagram.jpg|thumb|right|600px|Diagram of a neuron. LadyofHats, '''Wikimedia Commons''', 2007]]

[[Image:neurondiagram.jpg|thumb|right|600px|Diagram of a neuron. LadyofHats, '''Wikimedia Commons''', 2007]]

==Introduction==

==Introduction==

Nerves allow electrical impulses to propagate along their elongated cell extensions and facilitate the transfer of information throughout the body. Neural tissue is found within the [[Nervous_and_Special_Senses_-_Anatomy_%26_Physiology#Central_Nervous_System_.28CNS.29|central nervous system (CNS)]] and the [[PNS_Structure_-_Anatomy_%26_Physiology|peripheral nervous system (PNS)]] and the composition and constituent parts of neurones and their surrounding cells differ.  

Nerves allow electrical impulses to propagate along their elongated cell extensions and facilitate the transfer of information throughout the body. Neural tissue is found within the [[Nervous_and_Special_Senses_-_Anatomy_%26_Physiology#Central_Nervous_System_.28CNS.29|central nervous system (CNS)]] and the [[PNS_Structure_-_Anatomy_%26_Physiology|peripheral nervous system (PNS)]] and the composition and constituent parts of neurones and their surrounding cells differ only slightly.  

===CNS Neurons===

===CNS Neurons===

Neural tissue found in the CNS is composed of '''gray''' and '''white''' matter. The gray matter includes nerve cell bodies and some short branches from these cell bodies. The white matter is composed of the long extensions of the nerve, the nerve fibres. Within the central nervous system there are two major cell types; '''[[#Neurons|neurons]]''' which are the "functional" cells of the central nervous system and '''glial cells''' which play a supporting role within the CNS. Within the CNS there are also a number of other cells that play a supportive role to the neurone and these include [[#Astrocytes|astrocytes]], [[#Oligodendrocytes|oligodendrocytes]], [[#Microglial Cells|microglial cells]], [[#Ependymal Cells|ependymal cells]] and [[#Choroid Plexus Epithelial Cells|horoid plexus epithelial cells]].

Neural tissue found in the CNS is composed of '''gray''' and '''white''' matter. The gray matter includes nerve cell bodies and some short branches from these cell bodies. The white matter is composed of the long extensions of the nerve, the nerve fibres. Within the central nervous system there are two major cell types; '''[[#Neurons|neurons]]''' which are the "functional" cells of the central nervous system and '''glial cells''' which play a supporting role within the CNS. Within the CNS there are also a number of other cells that play a supportive role to the neurone and these include [[#Astrocytes|astrocytes]], [[#Oligodendrocytes|oligodendrocytes]], [[#Microglial Cells|microglial cells]], [[#Ependymal Cells|ependymal cells]] and [[#Choroid Plexus Epithelial Cells|horoid plexus epithelial cells]].