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Anatomy Atlases: Atlas of Human Anatomy in Cross Section: Section 6: Pelvis, Perineum, Hip, and Upper Thigh

Atlas of Human Anatomy in Cross Section: Section 6. Pelvis, Perineum, Hip, and Upper Thigh

Plate 6.21

Ronald A. Bergman, Ph.D., Adel K. Afifi, M.D., Jean J. Jew, M.D., and Paul C. Reimann, B.S.
Peer Review Status: Externally Peer Reviewed


Plate 6.21

Upper Left Quadrant

Lower Left Quadrant

Lower Right Quadrant

Upper Right Quadrant

1. Peritoneal cavity
2. Internal iliac a.
3. Right ureter
4. External iliac a.
5. Ovarian a. and v.
6. Ascending colon
7. Anterior superior iliac spine
8. Internal iliac v.
9. Psoas major m.
10. Gluteus minimus m.
11. Obturator nerve

12. Nerve to iliacus m.
13. Gluteus medius m.
14. Fifth lumbar nerve
15. Sacroiliac joint
16. Gluteus maximus m.
17. Interosseous sacroiliac ligament
18. Thoracolumber fascia
19. First sacral disk, fibrocartilage

20. Theca
21. Multifidus and iliocostalis lumborum mm.
22. Second sacral nerve
23. Sacrum
24. First sacral nerve
25. Ilium
26. Gluteus maximus m.
27. Gluteus medius m.
28. Sacroiliac joint
29. Fifth lumbar nerve
30. Nerve to iliacus m.
31. Iliacus m.
32. Fourth lumbar nerve
33. Obturator nerve

34. Femoral nerve
35. Ilium
36. Iliohypogastric and ilioinguinal nerves
37. Descending colon
38. Psoas moodier m.
39. Common iliac v.
40. Aponeuroses and abdominal oblique mm.
41. Common iliac a.
42. External iliac v.
43. Ovarian a. and v. and left ureter
44. Ileum
45. Ileum
46. Rectus abdominis m.
47. Mesentery, ileum
48. Linea alba

This section passes through the rectus abdominis muscles (46), ileum (44, 45), ascending (6) and descending (37) colon, sacroiliac joint (15, 28), and sacrum (23).

The following nerves can be identified: iliohypogastric and ilioinguinal (36), femoral (34), obturator (11, 33), fourth lumbar (32), nerve to iliacus (12, 30), first sacral (24), second sacral (22), and fifth lumbar (14). The theca (20) is still open at this level.

The left ureter crosses the common iliac artery (39), and the right ureter (3) crosses the common iliac artery at its point of bifurcation into external (4) and internal iliac (2) branches.

The anterior superior iliac spine of the ilium (7) is seen at this level.

The ureters (3, 43) lie medial to the ovarian arteries and veins (5, 43).

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