Systema nervosum in duo systemata dividitur: [[systema nervosum centrale]]<ref>[http://dictionary.reference.com/browse/systema+nervosum+centrale?qsrc=2446 terminus technicus medicus]</ref> et [[systema nervosum peripherale]].
<!--The '''nervous system''' is a [[Neural network|network]] of specialized cells that communicate information about an [[organism|organism's]] surroundings and itself. It processes this information and causes reactions in other parts of the body. It is composed of [[neuron]]s and other specialized cells called [[glial cells]] (plural form glia) that aid in the function of the neurons. The nervous system is divided broadly into two categories: the [[peripheral nervous system]] and the [[central nervous system]]. Neurons generate and conduct [[impulse]]s between and within the two systems. The peripheral nervous system is composed of sensory neurons and the neurons that connect them to the [[nerve cord]], [[spinal cord]] and [[brain]], which make up the [[central nervous system]]. In response to stimuli, sensory neurons generate and propagate signals to the [[central nervous system]] which then processes and conducts signals back to the [[muscle]]s and [[gland]]s. The neurons of the nervous systems of animals are interconnected in complex arrangements and use electrochemical signals and [[neurotransmitter]]s to transmit impulses from one neuron to the next. The interaction of the different neurons form neural circuits regulate an organism's perception of the world and what is going on with its body, thus regulating its behavior.
Nervous systems are found in many multicellular [[animal]]s but differ greatly in complexity between species.<ref>{{cite encyclopedia | title = Nervous System| encyclopedia = Columbia Encyclopedia| volume =| pages =| publisher = Columbia University Press| date = | id = | accessdate = 4/1/08}}</ref>-->
