The superior mesenteric plexus is a continuation of the lower part of the celiac plexus, receiving a branch from the junction of the right vagus nerve with the plexus.

Superior mesenteric plexus
The celiac ganglia with the sympathetic plexuses of the abdominal viscera radiating from the ganglia.
Details
From	celiac plexus
Identifiers
Latin	plexus mesentericus superior
TA98	A14.3.03.029
TA2	6705
FMA	6639
Anatomical terms of neuroanatomy [edit on Wikidata]

It surrounds the superior mesenteric artery, accompanies it into the mesentery, and divides into a number of secondary plexuses, which are distributed to all the parts supplied by the artery, viz., pancreatic branches to the pancreas; intestinal branches to the small intestine; and ileocolic, right colic, and middle colic branches, which supply the corresponding parts of the great intestine.

The nerves composing this plexus are white in color and firm in texture; in the upper part of the plexus close to the origin of the superior mesenteric artery is the superior mesenteric ganglion.