 | sternum
 | manubrium (1) |
 | sternal angle (2) |
 | body (3) |
 | xiphoid process (4) |
|
 | 12 pairs of ribs
 | 6 or 7 pairs of true ribs (5)
|
 | 3 or 4 pairs of false ribs (6)
|
 | 2 pairs of floating ribs (7)
|
|
 | thoracic inlet (superiorly) (8)
|
 | thoracic outlet (inferiorly) (9)
|
 | thoracic vertebrae, posteriorly
|