GUIDES
Thorax-Body Wall Organization
[Plate 179, Bony Framework of Thorax]Layers
First and second layers
Skin
Tela subcutanea (superficial fascia), including the breastsThird layer-muscles moving the upper limb
pectoralis major
pectoralis minor
serratus anteriorFourth layer-includes muscles of the chest wall
Ribs
Intercostal muscles
External intercostal muscles
Internal intercostal muscles
Innermost intercostal musclesIntercostal muscles