Intercostal muscles
Schematic illustration of the intercostal muscles on frontal section of intercostal space.
| Term name | Layer | |
|---|---|---|
| 1 | Parietal pleura | Layer 1 |
| 2 | Costal groove | Layer 1 |
| 3 | Endothoracic fascia; parietal fascia of thorax | Layer 1 |
| 4 | Collateral branch | Layer 1 |
| 5 | Posterior intercostal arteries | Layer 1 |
| 6 | Posterior intercostal veins | Layer 1 |
| 7 | External intercostal muscle | Layer 1 |
| 8 | Internal intercostal muscle | Layer 1 |
| 9 | Innermost intercostal muscle | Layer 1 |
| 10 | Intercostal nerve | Layer 1 |