1
.
| Intercostal nerve X |
2
.
| Costal cartilage X |
3
.
| Right rectus abdominis muscle |
4
.
| Umbilicus |
5
.
| External oblique muscle (aponeurosis, cut off) |
6
.
| Internal oblique muscle (cut off) |
7
.
| Left transversus abdominis muscle (upper pointer on aponeurosis, lower pointer on muscle) |
8
.
| Sheath of rectus abdominis muscle |
9
.
| Intercostal nerve XI |
10
.
| Thoracic nerve XII (subcostal nerve) |
11
.
| Iliohypogastric nerve |
12
.
| External oblique muscle (cut off at insertion) |
13
.
| Anterior cutaneous branch iliohypogastric nerve (pointers indicate two parallel divisions of this branch) |
14
.
| Lateral cutaneous branch iliohypogastric nerve (pointer indicates area in which nerve emerges through internal and external oblique muscle layers) |
15
.
| Deep circumflex iliac artery (ascending branch) |
16
.
| Iliac crest |
17
.
| Internal oblique muscle (cut off at iliac origin) |
18
.
| Anterior superior iliac spine |