The large vein passing through the armpit continuous with the basilic vein below and the subclavian vein above: "The axillary nerve supplies three muscles; deltoid (a muscle of the shoulder), teres minor (one of the rotator cuff muscles) and the long head of the triceps brachii (an elbow extensor)."

"The axillary nerves also carry sensory information from the shoulder joints, as well as the skin covering the inferior region of the deltoid muscle or the regimental badge area."