Viscera(Gut)
4
Plate270
MucosaofStomach
Cardiac orifice
Gastric folds (rugae)
Longitudinal folds
of gastric canal
(magenstrasse)
Pyloric
sphincter
Pylorus
Pyloric zone
Gastric and
fundic zones
Cardiac
zone
Zigzag (Z) line
(junction of gastric
and esophageal mucosa)
Superior (1st) part
of duodenum
(ampulla, or
duodenal cap)
Longitudinal muscle
of esophagus
Middle circular muscle
layer of stomach
Longitudinal muscle
of duodenum
Outer longitudinal muscle
layer of stomach (concentrated
chiefly at lesser and greater
curvatures and at pyloric part)
Outer longitudinal muscle
layer (
cut away
)
Middle circular
muscle layer
Innermost
oblique muscle
layer
Longitudinal
section
through
pyloric
region
(shows
thickened
pyloric
sphincter)
Circular muscle
of duodenum
Longitudinal
muscle of duodenum
(
cut away
)
Middle circular and
innermost oblique
fibers blend here
Windows cut in middle
circular muscle layer
