1
.
| Sternocleidomastoid muscle |
2
.
| Clavicle (covered by fascia) |
3
.
| Clavicular part pectoralis major muscle |
4
.
| Anterior supraclavicular nerve |
5
.
| Position of sternal angle |
6
.
| Mammary branch internal mammary artery |
7
.
| Anterior pectoral cutaneous branches intercostal nerves |
8
.
| Sternocostal part pectoralis major muscle (covered by pectoral fascia) |
9
.
| Sheath of rectus abdominis muscle |
10
.
| Posterior supraclavicular nerve |
11
.
| Deltoid muscle (covered by fascia) |
12
.
| Deltopectoral triangle |
13
.
| Middle supraclavicular nerves |
14
.
| Branch of lateral brachial cutaneous nerve |
15
.
| Axilla |
16
.
| Cephalic vein |
17
.
| Lateral thoracic artery and thoracoepigastric vein |
18
.
| Triceps brachii muscle (covered by brachial fascia) |
19
.
| Branches of dorsal antebrachial cutaneous nerve |
20
.
| Biceps brachii muscle (covered by brachial fascia) |
21
.
| Serratus anterior muscle (covered by fascia) |
22
.
| Lateral cutaneous branches of intercostal nerves |