CNRI / SCIENCE PHOTO LIBRARY CNRI / SCIENCE PHOTO LIBRARY
Knee joint. Coloured X-ray of a healthy knee joint. The joint is composed of three bones; the femur (thigh bone, upper frame), the tibia (shin bone, lower centre to bottom centre) and the patella (kneecap, centre left). To the right of the tibia is the narrow fibula bone, which runs down to the ankle.
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