the enteric nervous system is part of the peripheral nervous system and is found in the
Enteric nervous system The enteric nervous system in humans consists of some 500 million neurons[6] (including the various types of Dogiel cells),[1][7] one two-hundredth of the number of neurons in the brain, five times as many as the one hundred million neurons in the human spinal cord,[8] and about 2/3 as many as in the whole nervous system of a cat. The enteric nervous system is embedded in the lining of the gastrointestinal system, beginning in the esophagus and extending down to the anus.[8]
Sympathetic nervous system In the sympathetic nervous system and other components of the peripheral nervous system, these synapses are made at sites called ganglia. The cell that sends its fiber is called a preganglionic cell, while the cell whose fiber leaves the ganglion is called a postganglionic cell. As mentioned previously, the preganglionic cells of the sympathetic nervous system are located between the first thoracic segment and third lumbar segments of the spinal cord. Postganglionic cells have their cell bodies in the ganglia and send their axons to target organs or glands.