In the arm proper in human anatomy, the vanae comintantes of the brachial artery are called the brachial veins. The brachial veins work in reverse from the brachial arteries. The ulnar and radial veins join at the location where the brachial veins begin. The teres major muscle has an inferior border where the brachial veins end. Here, they form the axillary vein with the help of the basilic vein. There are small tributaries that drain the muscles of the upper arms formed by the brachial veins. These drain muscles such as the triceps and biceps. The brachial veins are part of the cardiovascular system of the human body. The brachial veins return the deoxygenated blood to the heart and lungs to collect new blood for circulation. The medial brachial vein is known to join the basilica vein, while the tributaries and main brachial vein join near the subscapularis to create the axillary vein. The brachial veins are known to have numerous anastomeoses with superficial veins as well as with their own.
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In Depth: Brachial veins