Axillary Artery

The axillary artery supplies the branches of blood vessels to the axilla (region under the arm) and the chest wall, including the skin and the shoulder; part of the mammary gland; the upper end of the humerus (upper arm bone); the shoulder joint; and various muscles in the back, shoulder, and chest. As the vessel leaves the axilla, it becomes the brachial artery.

 

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