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The '''nervous system'' is the set of [[neurons]] and support structures that process and organize information from the [[senses]] and bodily organs, analyze and coordinate appropriate responses and control the behavioral actions of an [[organism]]. All anatomical structures of the nervous system are made up of [[nervous tissue]].
Nervous systems first developed in the chordates with the some of the simplest systems represented in [[flatworms]] which has two nerve cords running on opposite sides which connect with a simple [[brain]] called [[ganglia]].
In modern [[vertebrates]] the nervous system is divided into two parts with the [[peripheral nervous system]] being defined as nervous tissue on the periphery of the body, basically everything other than the [[spinal cord]] and brain which are defined as part of the [[central nervous system]].
==References==
*Kandel, ER; Schwartz JH, Jessell TM (2000). Principles of Neural Science, 4th ed., New York: McGraw-Hill. ISBN 0-8385-7701-6.
*Martin, JH (2003). Neuroanatomy text and atlas 3rd ed., New York: McGraw-Hill.
* Sanes, Reh, Harris (2005). Development of the Nervous System, 2nd edition. Academic Press; ISBN 0-12-618621-9
Nervous systems first developed in the chordates with the some of the simplest systems represented in [[flatworms]] which has two nerve cords running on opposite sides which connect with a simple [[brain]] called [[ganglia]].
In modern [[vertebrates]] the nervous system is divided into two parts with the [[peripheral nervous system]] being defined as nervous tissue on the periphery of the body, basically everything other than the [[spinal cord]] and brain which are defined as part of the [[central nervous system]].
==References==
*Kandel, ER; Schwartz JH, Jessell TM (2000). Principles of Neural Science, 4th ed., New York: McGraw-Hill. ISBN 0-8385-7701-6.
*Martin, JH (2003). Neuroanatomy text and atlas 3rd ed., New York: McGraw-Hill.
* Sanes, Reh, Harris (2005). Development of the Nervous System, 2nd edition. Academic Press; ISBN 0-12-618621-9