Identify the following:

1. right external iliac artery

2. left external iliac artery

3. right external iliac vein

4. left external iliac vein

5. sigmoid colon

6. sigmoid mesentery

7. superior rectal vessels

8. descending colon

9. small bowel

10. bladder

11. psoas

12. iliacus

13. piriformis

14. inferior epigastric vessels