The brachial veins are located in the arm proper, the area between the shoulder and the elbow, and run alongside the brachial artery. The brachial veins work in reverse from the brachial artery. The ulnar and radial veins form a junction at the location where the brachial veins begin. The teres major muscle has an inferior border where the brachial veins end. At this point, they join to form the axillary vein. Notably, before they join, the basilic vein merges with the medial branch, which is the vein closest to the center of the body. The brachial veins connect to many small branches that drain the muscles of the upper arms. These include muscles such as the triceps and biceps. The brachial veins are part of the cardiovascular system of the human body. The brachial veins return oxygen-depleted blood to the heart and lungs to collect new blood for circulation.