Axillary Cavity -

The axilla is defined by several muscular and skeletal landmarks that shift shape with shoulder movement:

: The narrowest part, formed by the intertubercular sulcus (bicipital groove) of the humerus. Core Contents axillary cavity

Anatomy, Shoulder and Upper Limb, Axilla - StatPearls - NCBI The axilla is defined by several muscular and

: Formed by the axillary fascia and the skin of the armpit. Shoulder and Upper Limb

: Formed by the subscapularis , teres major , and latissimus dorsi muscles.

The , commonly referred to as the axilla or "armpit," is a four-sided pyramidal space located at the junction of the upper limb and the thorax. It serves as a vital gateway for neurovascular and lymphatic structures traveling between the neck/torso and the upper extremity. Anatomical Boundaries