: Formed by the subscapularis , teres major , and latissimus dorsi muscles.
The cavity is filled with fat and connective tissue, which cushions several major structures: axillary cavity
: The narrowest part, formed by the intertubercular sulcus (bicipital groove) of the humerus. Core Contents : Formed by the subscapularis , teres major
: Consists of the serratus anterior muscle and the first four or five ribs. : Formed by the subscapularis
Anatomy, Shoulder and Upper Limb, Axilla - StatPearls - NCBI