The difference between parasympathetic and sympathetic ( Autonomic nervous system)

 

Introduction 

The parasympathetic works in the state of rest and also during digestion, while the sympathetic works in the state of fight and flight , for example: when a person is being chased, for example, by a predator, and so on.

The function of the parasympathetic nervous system is at rest 

1. It maintains digestion and waste elimination  processes. 
2. The parasympathetic nervous system decreases both blood pressure and heart rate. 
3. The parasympathetic nervous system works to reduce blood supply to skeletal muscles. 
4. The parasympathetic nervous system acts to constrict the pupil ( miosis) . 
5. The parasympathetic nervous system acts to constrict the bronchi in the respiratory tract. 
6. The parasympathetic nervous system works to increase the movement of the gastrointestinal tract, which helps this system in the processes of digestion. 
7. The parasympathetic nervous system works to narrow the detrusor muscles in the bladder, on the other hand, works to dilute the internal urethral orifice in the bladder , these and other processes help push urine out of  the bladder.

The function of the sympathetic  nervous system is at flight and fight 

1. The sympathetic nervous system increases blood pressure and thus increases the heart rate. 
2. The sympathetic nervous system increases blood flow to skeletal muscles. 
3. The sympathetic nervous system dilates the pupils ( mydriasis ) . 
4. The sympathetic nervous system dilates the bronchi. 
5. The sympathetic nervous system decreases gastrointestinal motility (as opposed to the parasympathetic nervous system, which in turn increases gastrointestinal motility).
6. Mobilizer energy stores of the body.

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