The nervous system or the neural is a complex network of nerve cells or neurons specialized to carry messages. The complexity of the nervous system increases as we move towards higher animals. In simple organisms, especially in the invertebrates, neural system is just a network of neurons.
It is the body’s communication system that controls much of what your body does. It allows you to do things like walk, speak, swallow, breathe and learn, and controls how your body reacts in an emergency. Your nervous system is made up of: your peripheral nervous system, which consists of nerves that connect your CNS to the rest of your body
Thus, the nervous coordination involves the participation of the sense organs, nerves, spinal cord, and brain. One of the most complex organ system to ever evolve, the human nervous system consists of two parts, namely: Central Nervous System (CNS) is often called the central processing unit of the body.