Anatomy
The ENS consists of some one hundred million neurons, one thousandth of the number of neurons in the brain, and about one tenth the number of neurons in the spinal cord. The enteric nervous system is embedded in the lining of the gastrointestinal system.
The neurons of the ENS are collected into two types of ganglia: myenteric (Auerbach's) and submucosal (Meissner's) plexuses. Myenteric plexuses are located between the inner and outer layers of the muscularis externa, while submucosal plexuses are located in the submucosa.
Read more about this topic: Enteric Nervous System
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