Esophagus and Stomach 

The picture " " can link to it's
corresponding histological photograph. 

The picture " " can link to it's
corresponding histological drawing.




Esophagus


NN-10-a, upper portion, cs, HE
NN-10-b, middle portion, cs, HE 
NN-10-c; lower portion, cs, HE 


Mucosa

»»  Epithelium-Stratified squamous
»»  Lamina propria
»»  Lymphatic infiltration
»»  Mucosal gland
»»  Muscularis mucosa-smooth muscle
»»  thicker in lower portion

Submucosa ( with gland in middle portion )

»»  Blood vessels
»»  Nerve fibers

Tunica muscularis

»»  upper portion: striated muscle
»»  middle portion: 1/2 striated muscle; 1/2 smooth muscle
»»  lower portion: smooth muscle
»»  Inner circular
»»  Auerbach's plexus - - - Between two layers of muscles
»»  Outer longitudinal

Esophagus-stomach junction 


( NN-10-g, ls, HE )


Esophagus

»»  Stratified squamous epithelium
»»  Submucosa with gland

Stomach

»»  Simple columnar epithelium

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Stomach


   A) Cardiac region of stomach 
( NN-11-d, HE )


cardiac glands

   B) Fundic region of stomach 

( NN-11-j, cs, HE )

Mucosa

»»  Epithelium--simple columnar without goblet cells
»»  Mucus film ( pink )--free surface of epithelial cells
»»  Gastric pits ( foveolae )

Fundic gland

»»   simple tubular gland
»»   mucous neck cells
»»   chief cells
»»   parietal cells
»»   basal cells
»»   argentaffin cells

Lamina propria

»»  Lymphatic infiltration, Solitary lymphatic nodules

Submucosa

»»  Blood vessels
»»  Nerve fibers

Tunica muscularis ( smooth muscle fibers )

»»   Inner oblique
»»   Middle circular
»»   Outer longitudinal

Serosa

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   C) Pyloric antrum 

( NN-11-k, Human, HE )

Pits

»»  --deeper in the pyloric portion than the fundus

Simple coiled pyloric gland

»»  --produced mucus

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   D) Pylorus ( ls ) and Duodenum 

( NN-11-l, Monkey, cs , HE )

Pylorus

»»  simple columnar without goblet cell epi.
»»  Gastric pits
»»  Branched tubular gland
»»  Pyloric sphincter
     thickened middle coat of tunica muscularis

Duodenum

»»  Simple columnar with goblet cells epi.
»»  Submucosa with Brunner's glands
»»  will be seen in small intestine in detail

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