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GI System: Esophagus & StomachLaboratory Orientation
#126 H&E Mid-esophagus
Muscularis Externa
Skeletal muscle
Mixed smooth and skeletal muscle Submucosal
sero-mucous gland
Muscularis mucosae
Lamina propria
#126 Esophagus Also #153
Muscularis mucose
Submucosal gland
Muscularis Externa of mid-esophagus (#126):Skeletal and smooth m.
Muscularis Externa of lower esophagus (#155): Smooth muscle only
#155: Cardiac StomachCardio-esophageal junction (arrow)
Cardiac glands
#156: Fundic Stomach
Rugae
Mucosa of the Fundic Stomach
Lymphatic nodule
Muscularis mucosae
#156, #157: Gastric glands
Gastric pit lined by surface mucous cells
Mucous neck cells
Fundus or body
#157: Body of the gastric glands
#157: Base of the gastric glands
Chief cells
Parietal cells
#162 Pylolic StomachPylo-duodenal junction (arrow)
Pyloric sphincter muscle
Duodenum
Cardiac glands: coiled (mucous) glands pit:gland=1:1
Fundic (gastric) glands: straight glands pit:gland=1:5
Pyloric glands: coiled (mucous) glands pit:gland=2~3:1
GI System: Small and Large Intestine Laboratory Orientation
#29 Small Intestine
Mesentery (ct + epithelium)
Submucosa (connective tissue)
Mucosa (epithelium + lamina propria)
Muscularis Externa (smooth muscle)
LumenMuscularis mucosae
#29 – Intestinal Villi
Intestinal villi
#29-Simple columnar epithelium with striated border (microvilli) and goblet cells
Microvilli (striated border)
Goblet cells
Enterocytes?
#162 Pylo-duodenal junction (arrow)
Pyloric sphincter muscle
#161 Pylo-duodenal Junction and Pancreas
Pyloric stomach
Duodenum
Pancreas
Duodenum
Pancreas
Pyloric stomach
#161
Muscularis mucosae
Lymphatic nodules
Brunner’s gland
#161, 162 Duodenum
Lumen
Intestinal villus
Muscularis mucosaecrypts or i. glands
Brunner’s glands pancreas
#29, 168 Jejunum or Ileum
lumen
submucosa
Muscularis mucosae
Crypts of Lieberkuhn
#29, Intestinal glands (crypts)
Paneth cells
Enteroendocrine cells
Mitotic cell
? ?
?
#246
UCSF
Enteroendocrine cell
Paneth cell
#29, Myenteric (Auerbach’s) plexus
Ganglion cells
#176: Colon (Mucosa of the colon)
m.m
No villi, Straight glands, lots of goblet cells
#176 – colon
mucosa
#177-1, 177-3, 177-2 Recto-anal junction
Hemorrhoidal veins
Muscularis mucosae
Type of epithelium changesMuscularis mucosae fraysDilated veins