Editing Nerve (section)

===Nervous system===
{{main|Nervous system}}

The [[nervous system]] is the part of an [[animal]] that coordinates its actions by transmitting [[action potential|signals]] to and from different parts of its body.<ref>{{Cite book|title=Principles of Anatomy and Physiology (15th edition).|last=Tortora, G.J., Derrickson, B.|publisher=J. Wiley.|year=2016|isbn=978-1-119-34373-8}}</ref> In vertebrates it consists of two main parts, the [[central nervous system]] (CNS) and the [[peripheral nervous system]] (PNS). The CNS consists of the [[brain]] and [[spinal cord]]. The PNS consists mainly of nerves, which are enclosed bundles of the long fibers or [[axon]]s, that connect the CNS to all remaining body parts. Nerves that exit from the cranium are called [[cranial nerves]] while those exiting from the spinal cord are called [[spinal nerves]].