what is "sympathetic ganglia"?

Sympathetic ganglia are the nerves of sympathetic neural system. The sympathetic ganglia originate in the different segments of the spinal cord. These nerves are 22-23 pairs- 3 in the cervical region, 11 in the thoracic region, 4 in the lumbar region and 4-5 in the sacral region. These nerves provide information to the body about stress and up coming danger.

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