The Axillary Vein – lies on the antero-medial side of the axillary artery. The axillary vein begins at the inferior border of the teres major muscle
Where the Basilic Vein joins with the venae comitantes (deep brachial veins accompanying the brachial artery).
The Axillary Vein ends at the lateral border of the first rib, where it becomes the Subclavian Vein. This vein receives tributaries that correspond to the branches of the axillary artery.
However, there are two veins for each artery in the limbs. Superior to the pectoralis minor the axillary vein is joined by the Cephalic Vein.
The Axillary Sheath – the axillary artery, vein, and cords of the brachial plexus are enveloped in the thin fascial sheath. Anterior to the subclavian artery the prevertebral layer of cervical fascia is prolonged laterally, where it forms the axillary sheath. The sheath follows the cervicoaxillary canal.
