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Anatomy Atlases: Atlas of Human Anatomy in Cross Section: Section 2. Neck, Shoulders, Upper Arm, and Upper Thorax (Lungs)

Atlas of Human Anatomy in Cross Section: Section 2. Neck, Shoulders, Upper Arm, and Upper Thorax (Lungs)

Plate 2.9a

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 2.9a

Upper Left Quadrant

Lower Left Quadrant

1. Thymus
2. Inferior thyroid w.
3. Sternohyoid and sternothyroid mm.
4. Brachiocephalic v.
5. Internal thoracic a.
6. Rib 1 articulation with sternum
7. Lung, right upper lobe, anterior segment
8. Rib 2
9. Pectoralis minor m.
10. Skin, ventral
11. Superficial fascia
12. Pectoralis major m.
13. Intercostal mm.
14. Lung, right upper lobe, apical segment
15. Bursa m. pectoralis major
16. Rib 3
17. Humerus
18. Median nerve
19. Deltoid m
20. Axillary a.
21. Ulnar nerve

22. Axillary v.
23. Radial nerve
24. Long thoracic nerve
25. Thoracodorsal a.
26. Triceps brachii, lateral head m.
27. Circumflex scapular a.
28. Triceps brachii, long head m.
29. Rib 4
30. Teres major m.
31. Scapula
32. Teres minor m.
33. Subscapularis m.
34. Lung, right upper lobe, posterior segment
35. Scapula
36. Infraspinatus m.
37. Serratus anterior m.
38. Scapula, medial margin
39. Rib 5
40. Serratus posterior superior m.
41. Rhomboideus major m.
42. Costotransverse articulation
43. Trapezius m.
44. Rib 5, head
45. Longissimus thoracis m.
46. Spinalis thoracis m.
47. Skin, dorsal
48. Multifidus m.
49. Vertebra, T5 spinous process
50. Spinal cord
51. Subarachnoid space
52. Intercostal a. and w. and vertebra, T4 body

This section passes through the articulation of the first rib with the manubrium of the sternum (6, 93), inferior thyroid veins (2), right brachiocephalic artery (97) and vein (94), left common carotid artery (91), and left subclavian artery (89). The most common branching pattern of the aortic arch is seen in this specimen. In 70% of individuals the branching order is right brachiocephalic trunk (97), left common carotid artery (91), and left subclavian artery (89).

Several bronchopulmonary segments are identified: left lung, upper lobe and division, anterior (86) and apical posterior (62) segments, and right lung, upper lobe, posterior (34), apical (14), and anterior (7) segments.

The brachial plexus of nerves to the arm, forearm, and hand is breaking up into its terminal branches, which include musculocutaneous (79), median (72), radial (68), and ulnar (67) nerves. A branch of the radial, the axillary nerve (70), is also seen.

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