OSCAR BURRIEL / SCIENCE PHOTO LIBRARY OSCAR BURRIEL / SCIENCE PHOTO LIBRARY
Knee pain. Side view of a woman's knee, with a red area depicting pain in the joint. Magnetic reson- ance imaging (MRI) scans of the knee are in the background. The knee forms the joint between the thigh-bone (femur) and shin-bone (tibia). Capable of bending & slight rotation, it bears the weight of the body and is a common site of pain. Knee pain may be due to joint damage such as from an injury, like sudden twisting, or from arthritis.
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