Nervous system is the universe of the living organisms. The anatomical system wherein the vertebrates is composed of the brain & spinal cord, nerves, sense organs and parts of receptor organs that receives and interprets stimuli & transmits impulses to the effector organs. The universe of the nervous system is an amalgamation and is bifurcated into Central Nervous System, Cranial Nervous System, Peripheral Nervous System, Autonomic Nervous System, Somatic Nervous System.