Editing Nerve (section)

==Function==
A nerve conveys information in the form of electrochemical impulses (as nerve impulses known as [[action potential]]s) carried by the individual neurons that make up the nerve. These impulses are extremely fast, with some [[myelinated]] neurons conducting at speeds up to 120&nbsp;m/s. The impulses travel from one neuron to another by crossing a [[synapse]], where the message is converted from [[Electrical synapse|electrical]] to [[Chemical synapse|chemical]] and then back to electrical.<ref name="Marieb" /><ref name="Purves" >{{cite book | last1 = Purves |first1=Dale|first2= George J.| last2=Augustine |first3=David |last3=Fitzpatrick|first4= William C. |last4=Hall|first5= Anthony-Samuel |last5=LaMantia|first6= James O.|last6= McNamara|first7= Leonard E. |last7=White | title = Neuroscience| url = https://archive.org/details/neuroscienceissu00purv | url-access = limited |edition=4 | publisher = Sinauer Associates | pages = [https://archive.org/details/neuroscienceissu00purv/page/n36 11]–20 | date = 2008 | isbn = 978-0-87893-697-7}}</ref>

===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]].