The axilla is defined by several muscular and skeletal landmarks that shift shape with shoulder movement:
: Formed by the subscapularis , teres major , and latissimus dorsi muscles. axillary cavity
The cavity is filled with fat and connective tissue, which cushions several major structures: The axilla is defined by several muscular and
Anatomy, Shoulder and Upper Limb, Axilla - StatPearls - NCBI which cushions several major structures: Anatomy
: Primarily composed of the pectoralis major and pectoralis minor muscles.