What is a neuron? What is a nerve?

Return to PCS 1 Internet Links Return to Class Notes Panel Figures Index Click on graphic below to visit a useful website on the Nervous System. Source:  modified by DeWitt: Emory MiniMedical School: The Nervous System The neuron is the functional unit of the nervous system. Humans have about 100 billion neurons in their brain alone! While variable in size and shape, all neurons have three parts. Dendrites receive information from another cell and transmit the message to the cell body. The cell body contains the nucleus, mitochondria and other organelles typical of eukaryotic cells. The axon conducts messages away from the cell body. Ref: http://gened.emc.maricopa.edu/bio/bio181/BIOBK/BioBookNERV.html   What is a nerve?  CLICK on the icon below. To learn what happens between  one neuron and a muscle cell  click the icon below. Return to the Top