Write a note on Autonomous nervous system.
ANS:



The system which is responsible for the intervention in the activities of the organs located in the body cavity without the awareness of brain is called autonomous nervous system.

This system controls heart, blood vessels, glands, uterus and coelomic organs.

Autonomous nervous system is of two types : (i) sympathetic (ii) parasympathetic.

The involuntary actions of the body are controlled and regulated by the coordination of these two systems.

The effects of sympathetic and parasympathetic nervous systems are complimentory and contradictory.

For example : If the sympathetic system increases the heartbeats abnormally, the parasympathetic system decreases it and brings it back to normal.