Identify the following:

1. terminal ileum

2. right common iliac artery

3. left common iliac artery bifurcation

4. right common iliac vein

5. left common iliac vein

6. sigmoid arteries

7. superior rectal artery

8. small bowel

9. small bowel mesentery

10. descending colon

11. external oblique

12. internal oblique

13. transversus abdominis