Upper Left Quadrant

Lower Left Quadrant

Lower Right Quadrant

Upper Right Quadrant

1. Rib 3
2. Right atrium
3. Lung, right upper lobe, anterior segment, and superior vena cava
4. Pleural cavity
5. Right pulmonary a.
6. Rib 4
7. Pectoralis major m.
8. Pectoralis minor m.
9. Lateral thoracic a. and v.
10. Bronchus, right
11. Ribs

12. Lung, right upper lobe, posterior segment
13. Right pulmonary v.
14. Rib 6
15. Long thoracic nerve and thoracodorsal a. and v.
16. Latissimus dorsi m.
17. Serratus anterior m.
18. Teres major m.
19. Scapula, inferior angle
20. Rib 7
21. Rhomboideus major m.
22. Intercostal neurovascular bundle
23. Lung, right lower lobe, superior segment, and esophagus
24. Levator costae m.
25. Intercostal v.
26. Trapezius m.
27. Azygos v.
28. Dorsal root ganglion in intervertebral foramen
29. Thoracic duct
30. Spinal cord

31. Interspinous ligament
32. Ligamentum flavum and vertebral body, T7
33. Inferior and superior articular processes, zygapophyseal joint
34. Multifidus m.
35. T7 spinal nerve root and hemiazygos v.
36. Thoracolumbar fascia, anterior layer
37. Longissimus thoracis m.
38. Thoracic aorta
39. Pericardium
40. Scapula, inferior angle; insertion of serratus anterior m.
41. Teres major m.
42. Bronchus, left
43. Lung, left lower lobe, superior segment
44. Left pulmonary w.

45. Intercostal mm. and left interlobar (oblique) fissure
46. Lung, left upper lobe, upper division, apical posterior segment, and left pulmonary v.
47. Left atrium
48. Pericardiacophrenic a. and phrenic nerve
49. Left coronary a.
50. Left anterior descending a. and v.
51. Lung, left upper lobe, upper division, anterior segment
52. Right ventricle
53. Internal thoracic a. and v.
54. Ascending aorta, semilunar valve fragments and aortic sinus (of Valsalva)
55. Right coronary a.
56. Sternum, body