Arm anatomy. Computer artwork of an oblique anterior view looking up a human arm, showing muscles and tendons (brown and white), bones and ligaments (white), arteries and veins (red and blue), nerves (yellow), and lymph vessels (green). The arm articulates with the torso at the shoulder joint. The upper arm articulates with the lower arm at the elbow, and the lower arm articulates with the hand at the wrist. The main bones are the humerus, ulna and radius. Major muscles are the deltoid (shoulder), biceps (upper arm) and, brachioradialis (forearm).
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