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Radius and Ulna

radius+and+ulna+anatomy+images | Radius and Ulna | Anatomy Study Buddy

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The radius connects to many muscles, such as the biceps, supinator, flexor digitorum superficialis, flexor pollicis longus muscles, extensor ossis metacarpi pollicis, extensor primi internodii pollicis and the pronator teres muscles Furthermore, the radius is found on each arm thus contributing a total of two bones to the human body skeleton. http://www.learnbones.com/arm-bones-anatomy/

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Forearm positions. Supination refers to the palms facing foward and the radius and ulna are parallel. Pronation refers to palms facing rearward and the radius and ulna are crossed.