General+Divisions+of+the+Nervous+System

Information- []
 * the //cell body//, containing the **nucleus**
 * the //axon// (or //nerve fiber//), varying in length from a millimeter to a meter, which conduct **outgoing** signals emitted by the neuron. Axons are encased in a fat-like sheath, called **myelin**, which acts like an insulator and, along with the **Nodes of Ranvier**, speeds impulse transmission.

2 main parts of nervouse system. Central Perifrial