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GI System: Esophagus & Stomach Laboratory Orientation. #126 H&E Mid-esophagus. Lamina propria. Muscularis mucosae. Muscularis Externa. Submucosa. Mixed smooth and skeletal muscle. Skeletal muscle. Submucosal sero-mucous gland. #126 Esophagus Also #153. Muscularis mucose.
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GI System: Esophagus & Stomach Laboratory Orientation
#126 H&E Mid-esophagus Lamina propria Muscularis mucosae Muscularis Externa Submucosa Mixed smooth and skeletal muscle Skeletal muscle Submucosal sero-mucous gland
#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 Muscularis mucosae Lymphatic nodule
#156, #157: Gastric glands Gastric pit lined by surface mucous cells Mucous neck cells Fundus or body
#157: Base of the gastric glands Parietal cells Chief cells
#162 Pylolic StomachPylo-duodenal junction (arrow) Duodenum Pyloric sphincter muscle
Fundic (gastric) glands: straight glands pit:gland=1:5 Cardiac glands: coiled (mucous) glands pit:gland=1:1 Pyloric glands: coiled (mucous) glands pit:gland=2~3:1
#29 Small Intestine Submucosa (connective tissue) Mucosa (epithelium + lamina propria) Lumen Muscularis mucosae Mesentery (ct + epithelium) Muscularis Externa (smooth muscle)
#29 – Intestinal Villi Intestinal villi
#29-Simple columnar epithelium with striated border (microvilli) and goblet cells Enterocytes ? Goblet cells Microvilli (striated border)
#162 Pylo-duodenal junction (arrow) Pyloric sphincter muscle
#161 Pylo-duodenal Junction and Pancreas Pancreas Pyloric stomach Duodenum Pyloric stomach Pancreas Duodenum
#161 Brunner’s gland Muscularis mucosae Lymphatic nodules
#161, 162 Duodenum Brunner’s glands pancreas Muscularis mucosae crypts or i. glands Intestinal villus Lumen
#29, 168 Jejunum or Ileum lumen Muscularis mucosae submucosa Crypts of Lieberkuhn
#29, Intestinal glands (crypts) Mitotic cell ? ? ? Enteroendocrine cells Paneth cells
#246UCSF 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 changes Muscularis mucosae frays Dilated veins