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

2. #29 Small Intestine Submucosa (connective tissue)
Mucosa (epithelium + lamina propria)
Lumen
Muscularis mucosae
Mesentery (ct + epithelium)
Muscularis Externa (smooth muscle)

3. #29 – Intestinal Villi
Intestinal villi

4. #29-Simple columnar epithelium with striated border (microvilli) and goblet cells
Enterocytes ?
Goblet cells
Microvilli (striated border)

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

6. #161 Pylo-duodenal J. with Pancreas
Pyloric stomach
Duodenum

7. #161
Brunner’s gland
Muscularis mucosae
Lymphatic nodules

8. #161, 162 Duodenum ? Brunner’s glands Muscularis mucosae ?
pancreas
Muscularis mucosae ?
crypts or i. glands
Intestinal villus
Lumen

9. #29, 168, 169, 170 Jejunum or Ileum lumen submucosa
Muscularis mucosae
submucosa
Crypts of Lieberkuhn

10. #29, Intestinal glands (crypts)
Mitotic cell ? ? ?
Enteroendocrine cells
Paneth cells

11. #246
Enteroendocrine cell
Paneth cell

12. #29, Myenteric (Auerbach’s) plexus
Ganglion cells

13. #176, 177: Colon (Mucosa of the colon)
m.m
No villi,
Straight glands,
lots of goblet cells

14. #176 – colon
mucosa

15. #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.

16. #177-1, 177-3, 177-2 Recto-anal junction
Hemorrhoidal veins
Muscularis mucosae
Type of epithelium changes
Muscularis mucosae frays
Dilated veins

17. Cardio-esophageal junction (arrow)

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

19. #170 Small Intestine

20. #194 Gallbladder Mucosa epithelium lamina propria Smooth muscle
Simple columnar ep.
Adventitial c.t.
Liver