Anterior view of the thoracic skeleton

Term name Layer
1 Superior thoracic aperture; thoracic inlet Layer 1
2 Inferior thoracic aperture; thoracic outleet Layer 1
3 Intercostal space Layer 1
4 Costal margin; costal arch Layer 1
5 Infrasternal angle; subcostal angle Layer 1
6 Rib Layer 1
7 Costal cartilage Layer 1
8 Floating ribs [XI-XII] Layer 1
9 False ribs [VIII-XII] Layer 1
10 True ribs [I-VII] Layer 1
11 Ribs [I-XII] Layer 1
12 Jugular notch; suprasternal notch Layer 2
13 Pulmonary groove Layer 2
14 Costal notches Layer 2
15 Xiphoid process Layer 2
16 Body of sternum Layer 2
17 Xiphisternal joint Layer 2
18 (Manubriosternal synchondrosis) Layer 2
19 Clavicular notch Layer 2
20 Manubrium of sternum Layer 2
21 Sternum Layer 2