Axillary Cavity 【2K – FHD】

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

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

: 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. : The narrowest part, formed by the intertubercular

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

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

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

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