Axillary Cavity May 2026

: Consists of the serratus anterior muscle and the first four or five ribs.

: Primarily composed of the pectoralis major and pectoralis minor muscles.

: The top of the pyramid, formed by the first rib , the scapula , and the clavicle . It connects the axilla to the posterior triangle of the neck. axillary cavity

The cavity is filled with fat and connective tissue, which cushions several major structures:

The axilla is defined by several muscular and skeletal landmarks that shift shape with shoulder movement: : Consists of the serratus anterior muscle and

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

Anatomy, Shoulder and Upper Limb, Axilla - StatPearls - NCBI formed by the first rib

: Formed by the axillary fascia and the skin of the armpit.