Axillary Cavity ✯ [ PROVEN ]

: 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 , 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 axillary cavity

Anatomy, Shoulder and Upper Limb, Axilla - StatPearls - NCBI : The top of the pyramid, formed by

The axilla is defined by several muscular and skeletal landmarks that shift shape with shoulder movement: It serves as a vital gateway for neurovascular

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

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