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what is sympathetic nervous system?

The sympathetic nervous system belongs to autonomic nervous system along with parasympathetic nervous system. The sympathetic nerves starts from the spinal column running towards the middle part of spinal cord in the lateral horn. It originates at the spinal cord’s first thoracic segment and extends to third lumbar segment. This nervous system is considered to have thoracolumbar outflow since the cells of these nerves originates in the lumbar and thoracic regions.


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