The enteric nervous system, which extends from the esophagus to the anus, contains approximately 100 million neurons and is organized into the myenteric and submucosal plexuses. The myenteric plexus enhances muscle contractions, while the submucosal plexus regulates local secretion and absorption. Parasympathetic stimulation from the vagus nerve increases enteric activity, while sympathetic stimulation inhibits muscle contractions via norepinephrine.

1. NEURAL CONTROL OF GIT

2. ENTERIC NERVOUS SYSTEM
It begins from the esophagus and extending
all the way to anus.
About 100 million neurone are present in
it.

3. MYENTERIC PLEXUS OR AUERBACH’S
PLEXUS
Outer plexus lying between the longitudnal and
circular muscle layers.
Functions:-
1.Increase tonic contraction.
2.Increase intensity of rythmical contraction.
3.Increase velocity of conduction.

4. SUBMUCOSAL PLEXUS OR MEISSNER
PLEXUS
Inner plexus that lies in submucosa.
Functions
It controls the local intestinal
secretion,local absorption and local
contraction of submucosa plexus.

5. NEUROTRANSMITTERS
1.Acetylcholine (excitatory)
2.Norepinephrine (inhibitory)
3.Serotonin
4.Dopamine
5.Cholicystokinin
6.Substance P
7.Somatostatin

7. Autonomic nervous system
Parasympathatic stimulation
It is supplied by the cranial (vagus) and
sacral(2nd,3rd and 4th) divisions.
Functions:-
It increases the activity of enteric nervous
system.

8. Sympthatic stimulation
It is supplied by the segments
T5 and L2.
Functions:-
it inhibits the smooth muscle contractions by
secreting norepinephrine.