This feature is not available right now please try again later. The autonomic nervous system is divided into the sympathetic nervous system and parasympathetic nervous system the sympathetic division emerges from the spinal cord in the thoracic and lumbar areas terminating around l2 3. Introduction the function of the autonomic nervous system is to maintain at a constant level the internal environment of the body homeostasis. The autonomic nervous system regulates a variety of body process that take place without conscious effort the autonomic system is the part of the peripheral nervous system that is responsible as the name implies for regulating involuntary body functions such as heartbeat blood flow breathing and digestion
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