The Nervous System - Research Article from UXL Complete Health Resource

This encyclopedia article consists of approximately 36 pages of information about The Nervous System.
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Design: Parts of the Nervous System

Neurons

The cells making up the brain, spinal cord, and nerves are called neurons. They are special cells capable of receiving a stimulus (nerve or electrical impulse), transmitting that stimulus throughout their length, and then delivering that stimulus to other cells next to them. The human body contains about 200 billion neurons. Almost half of them are located in the brain.

The brain and the spinal cord are the two major parts of the central nervous system, or CNS. The CNS acts as the command center of the body. (Illustration by Kopp Illustration, Inc.) The brain and the spinal cord are the two major parts of the central nervous system, or CNS. The CNS acts as the command center of the body. (Illustration by Kopp Illustration, Inc.)

A neuron consists of three main parts: the cell body, dendrites, and an axon (dendrites and axons are both referred to as nerve fibers). The cell body has most of the same structures found in typical body cells, such as a nucleus (the part of the cell that...

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This section contains 10,659 words
(approx. 36 pages at 300 words per page)
Buy The Nervous System Encyclopedia Article
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UXL Complete Health Resource
The Nervous System from UXL Complete Health Resource. ©2005-2006 by U•X•L. U•X•L is an imprint of Thomson Gale, a division of Thomson Learning, Inc. All rights reserved.
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