HELENE FOURNIE, ISM / SCIENCE PHOTO LIBRARY HELENE FOURNIE, ISM / SCIENCE PHOTO LIBRARY
Elbow bones. Illustration of the bones of the elbow seen in anterior (frontal) view with the arm extended. The upper arm bone (humerus) articulates with the radius and ulna in the forearm, forming a hinge joint. Also shown here are the articular cartilages (blue), a form of hyaline cartilage that smooths and aids joint movements.
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