<Tr> <Td_colspan="2"> Anatomical terminology (edit on Wikidata) </Td> </Tr> <P> The sympathetic nervous system (SNS) is one of the two main divisions of the autonomic nervous system, the other being the parasympathetic nervous system . (The enteric nervous system (ENS) is now usually referred to as separate from the autonomic nervous system since it has its own independent reflex activity .) </P> <P> The autonomic nervous system functions to regulate the body's unconscious actions . The sympathetic nervous system's primary process is to stimulate the body's fight - or - flight response . It is, however, constantly active at a basic level to maintain homeostasis . The sympathetic nervous system is described as being complementary to the parasympathetic nervous system which stimulates the body to "feed and breed" and to (then) "rest - and - digest". </P> <P> There are two kinds of neurons involved in the transmission of any signal through the sympathetic system: pre-ganglionic and post-ganglionic . The shorter preganglionic neurons originate from the thoracolumbar region of the spinal cord specifically at T1 to L2 ~ L3, and travel to a ganglion, often one of the paravertebral ganglia, where they synapse with a postganglionic neuron . From there, the long postganglionic neurons extend across most of the body . </P>

What is the function of the sympathetic division of the ans
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