GI Sequence - Histology

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Presentation transcript:

GI Sequence - Histology Small and Large Intestines Recto-anal junction January 16, 2008

#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)

Pylolic Stomach Pylo-duodenal junction (arrow) Pyloric sphincter muscle

#161 Pylo-duodenal J. with Pancreas Pyloric stomach Duodenum

#161 Brunner’s gland Muscularis mucosae Lymphatic nodules

#161, 162 Duodenum ? Brunner’s glands Muscularis mucosae ? pancreas Muscularis mucosae ? crypts or i. glands Intestinal villus Lumen

#29, 168, 169, 170 Jejunum or Ileum lumen submucosa Muscularis mucosae submucosa Crypts of Lieberkuhn

#29, Intestinal glands (crypts) Mitotic cell ? ? ? Enteroendocrine cells Paneth cells

#246 Enteroendocrine cell Paneth cell

#29, Myenteric (Auerbach’s) plexus Ganglion cells

#176, 177: Colon (Mucosa of the colon) m.m No villi, Straight glands, lots of goblet cells

#176 – colon mucosa

#175: Appendix Mucosa is like colon: no villi, straight glands Muscularis externa is like small intestine: Two layers of s. muscle Heavy infiltration of lymphatic tissues forming nodules.

#177-1, 177-3, 177-2 Recto-anal junction Hemorrhoidal veins Muscularis mucosae Type of epithelium changes Muscularis mucosae frays Dilated veins

Cardio-esophageal junction (arrow)

Chief cells Paneth cells Parotid gland acinar cells Mixed salivary glands Serous demilune cells Serous acinar cells von Ebner’s gland

#170 Small Intestine

#194 Gallbladder Mucosa epithelium lamina propria Smooth muscle Simple columnar ep. Adventitial c.t. Liver