The nervous system of vertebrate species is consists of two principle paths, central nervous system (CNS) and peripheral nervous system (PNS). The CNS, can understudied easily is an axial nervous system of whole body involve brain and spinal cord, is the major part which both sent and receive signals from difference regions of the body via special receptors. PNS has neuron, which are enclosed bundles of the long fibers or axons that connect to the CNS thus their signals capable across throughout the CNS and PNS simultaneously. The PNS is divided into voluntary and autonomic nervous system (ANS). The ANS is further subdivided into the sympathetic and the parasympathetic nervous systems. ANS is unconsciously control vary organs such as cardio,
