1. Ligament of Treitz - conditional border between Duodenum (19) and Jejunum (23).
4. Liver
6. Gallbladder
8. Ascending colon
9. Transverse colon
10. Cecum
11. Spleen
12. Stomach
15. Oral cavity
16. Pharynx
17. Esophagus
18. Bile ducts
19. Duodenum (the upper part of small intestine)
20. Ileum (lower part of small intestine)
21. Pancreas
22. Colon
23. Jejunum (middle part of small intestine)
24. Descending colon
25. Sigmoid colon
26. Rectum