<P> The nervous system is defined by the presence of a special type of cell -- the neuron ( sometimes called `` neurone '' or `` nerve cell '' ) . Neurons can be distinguished from other cells in a number of ways , but their most fundamental property is that they communicate with other cells via synapses , which are membrane - to - membrane junctions containing molecular machinery that allows rapid transmission of signals , either electrical or chemical . Many types of neuron possess an axon , a protoplasmic protrusion that can extend to distant parts of the body and make thousands of synaptic contacts ; axons typically extend throughout the body in bundles called nerves . </P>
<P> The nervous system is defined by the presence of a special type of cell -- the neuron ( sometimes called `` neurone '' or `` nerve cell '' ) . Neurons can be distinguished from other cells in a number of ways , but their most fundamental property is that they communicate with other cells via synapses , which are membrane - to - membrane junctions containing molecular machinery that allows rapid transmission of signals , either electrical or chemical . Many types of neuron possess an axon , a protoplasmic protrusion that can extend to distant parts of the body and make thousands of synaptic contacts ; axons typically extend throughout the body in bundles called nerves . </P>
what part of the nervous system is found throughout the body
what part of the nervous system is found throughout the body
axons typically extend throughout the body in bundles called nerves
axons typically extend throughout the body in bundles called nerves