| − | The system of [[nerve|nerves]] which carries instructions from the [[central nervous system]] to the body's [[organ|organs]]. | + | The system of [[nerve|nerves]] which carries instructions from the [[central nervous system]] to the body's [[organ|organs]]<ref>Martin, JH (2003). Neuroanatomy text and atlas 3rd ed., New York: McGraw-Hill</ref><ref>Kandel, ER; Schwartz JH, Jessell TM (2000). Principles of Neural Science, 4th ed., New York: McGraw-Hill. ISBN 0-8385-7701-6</ref>. |
| − | * Kandel, ER; Schwartz JH, Jessell TM (2000). Principles of Neural Science, 4th ed., New York: McGraw-Hill. ISBN 0-8385-7701-6.
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