What is Nervous System


What is Nervous System?


Introduction:

     Nervous system is considered a very important system of the body. This system controls, governs and coordinates to the whole body and its different portions and functions of all the organs. It keeps on sustaining the homeostasis. Having control on all the voluntary and involuntary deeds of the body and transmitting all the sensations into the brain by absorbing them is the deed of this system.  It makes the quick adjustment possible according to the internal and external surrounding changes of all the organs and it transmits all the nerve impulses.

     The nervous system produces a kind of balance in the activities of numerous body cells so that the whole body may do the work as a unit. The internal and external surrounding changes of the body and stimuli reach into the spinal cord of nervous system and brain through sensory nerves where they are analyzed and in response several functions of the body are completed by the motor nerves.  

     The nervous system is made of nervous tissues in which there are neurons or nerve cells and nerve fibers related to them and a special kind of connective tissue which is called neuroglia is also present in it.