The autonomic nervous system
© Jupiter Images / iStockphoto
Whether respiration, digestion, metabolism or water balance - the autonomic nervous system controls around the clock all the essential basic functions of the human body.
This is done largely without our will. Therefore, you can not stop the digestion will or dilate the blood vessels, for example. Even with unconsciousness the autonomic nervous system nor any of its functions exercises.
The autonomic nervous system is a kind the "mediator" between the non-controllable functions of the body and the brain is: On the one hand, it receives signals from the brain and forwards them to the corresponding organs - the other hand, it can also detect messages of the body and transmitted to the brain.
Basically, the autonomic nervous system is in three different nervous systems divide - in
The enteric nervous system regulated largely independent of the brain Movement of the intestine in digestion.
Of the sympathetic and the parasympathetic work in the body mostly as opponentThe sympathetic nervous system puts the body into a state of higher awareness and readiness to flee, the parasympathetic nervous system, however, brings man into an idle state.
In a dangerous situation the sympathetic nervous system puts the body on alert. The result: The heart beats faster, the pupils dilate and blood pressure rises.
There is no longer a threat, the functions of the parasympathetic set a: man calmed down, drops his heart rate, his sweat glands do not work more strengthened and his lungs need less oxygen.