Identify the following:

1. spleen

2. liver

3. stomach

4. aorta

5. left adrenal gland

6. right kidney

7. left kidney

8. splenic vein

9. body of pancreas

10. head of pancreas

11. portal vein

12. inferior vena cava

13. common bile duct

14. gallbladder

15. descending colon

16. transverse colon

17. small bowel

18. duodenum

19. superior mesenteric artery

20. right renal vein

21. antrum of stomach