SCIENCE PHOTO LIBRARY SCIENCE PHOTO LIBRARY
Knee joint. Coloured X-ray of the healthy knee joint of an adult woman, seen from the side. The knee is the largest joint in the body. It is formed by the articulation of the femur (thigh bone, upper centre) with the tibia (shin bone, lower centre). The smaller fibula (left of tibia) is also seen. The kneecap (patella, far right) lies over the lower part of the femur.
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