: Formed by the subscapularis , teres major , and latissimus dorsi muscles.
: Formed by the axillary fascia and the skin of the armpit. axillary cavity
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 : Formed by the subscapularis , teres major
: Primarily composed of the pectoralis major and pectoralis minor muscles. It serves as a vital gateway for neurovascular
The axilla is defined by several muscular and skeletal landmarks that shift shape with shoulder movement:
: Consists of the serratus anterior muscle and the first four or five ribs.
Anatomy, Shoulder and Upper Limb, Axilla - StatPearls - NCBI