The medial basilic vein extends through the arm between the biceps and pronator teres muscles. It joins with the ulnar vein to form the bascilic vein, which terminates as the axillary vein. Research Medial Basilic Vein
The pronator teres (pronator radii teres) is a short, round, deep arm muscle. It originates high on the humerus , slightly higher than the flexor mass on the forearm. The muscle ends in a flat tendon which inserts in the radius. It is innervated by the mediannerve and supplied by branches of the ulnar artery and the radial artery. This muscle pronates the forearm and assists in bending the elbow. Research Pronator Teres
 
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