1. DIGESTIVE

2. ESOPHAGUS Stratified squamous epithelium Submucosa The muscularis externa Esophageal glands.

3. AB E D C

4. A B

5. A B C D E

6. STOMACH A B C D A: Simple columnar epithelium. B: Gastric gland C: Submucosa D:Muscularis externa

7. A B C D

8. A B C

9. A B C

10. SMALL INTESTINE (DUODENUM) A B C D E A: Simple columnar with a striated border B: Mucosa or lamina propria C: Submucosa with Brunner’s glands. D: Inner circular of muscularis externa. E: Outer longitudinal of muscularis externa.

11. B C A D E

12. A B C

13. SMALL INTESTINE (JEJUNUM) A B C D A: Epithelium is simple columnar with striated border B: Mucosa C: Submucosa D: Muscularis externa

14. A B C D

16. SMALL INTESTINE (ILEUM) A B C D A: Simple columnar with striated border B: Mucosa. C: Submucosa D: Muscularis externa

19. AUERBACH’S PLEXUS A B C A: Outer longitudinal layer of muscualris externa. B: Auerbach’s nerve plexes C: Inner Circular of muscularis externa.

21. MEISSNER’S PLEXUS LP: Lamina Propria. MM: Muscularis mucosa SM: Submucosa. PG: Meissner’s plexes

23. LARGE INTESTINE A B C D E A: Simple columnar epithelium. B: Goblet cells C: Mucosa. D: Muscularis mucosa. E: Submucosa

26. LIVER A B C D E 9 A: Hepatic triad B: Hepatic lobule C: Gallbladder D: Hepatic sinusoids E: Von Kupffer cells

28. A B C

30. PANCREAS A B B A: Pancreatic acini B: Islets of Langerhans are endocrine structures.