Description: THE NERVOUS SYSTEM. Table of Contents. Nervous tissue is composed of two main cell types: neurons and glial cells. Neurons transmit nerve messages. Glial cells are in direct contact with neurons and often surround them. chemicals such as opium and heroin. Neurological diseasesfor example Parkinson's disease and Huntington's diseaseare

Category: Neurological System

Url: http://www.emc.maricopa.edu/faculty/farabee/BIOBK/BioBookNERV.html

Date: Oct 7, 2005

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