User:Nrets/Page1

 Nrets 15:19, 16 November 2006 (UTC)  Nrets 15:21, 16 November 2006 (UTC)

Neurons are typically composed of a soma, or cell body, a dendritic tree and an axon. The majority of vertebrate neurons receive input on the cell body and dendritic tree, and transmit output via the axon, although there is great heterogeneity throughout the nervous system, as well as throughout the animal kingdom, in the size, shape and function of neurons. For invertebrate neurons, the information flow is less well defined.