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50.4 MB (50.0 MB compressed)
3831 x 4601 pixels
32.5 x 38.9 cm ⏐ 12.8 x 15.3 in (300dpi)
JOHN BAVOSI / SCIENCE PHOTO LIBRARY JOHN BAVOSI / SCIENCE PHOTO LIBRARY
Knee in rheumatoid arthritis. Artwork of the internal structure of a knee joint during the early stages of rheumatoid arthritis. This is a condition in which the body's immune system attacks the tissues of the joints. The plates of cartilage (menisci, red) on the knee joint are partly worn away. The menisci allow the bones of the knee to slide over one another smoothly. Erosion of the menisci causes severe joint pain and immobility. The bones of the knee are the femur (thigh bone, upper right), the tibia (shin bone, lower left) and the patella (kneecap, upper left). The fibula (the other lower leg bone) is at lower centre.
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