PROF. P. MOTTA / DEPT. OF ANATOMY / UNIVERSITY "LA SAPIENZA", ROME / SCIENCE PHOTO LIBRARY PROF. P. MOTTA / DEPT. OF ANATOMY / UNIVERSITY "LA SAPIENZA", ROME / SCIENCE PHOTO LIBRARY
Human bone. Coloured scanning electron micrograph of trabeculae in cancellous (spongy) bone tissue of the femur. Bone tissue is divided into compact and cancellous. The latter fills the interior of bones and the cavities between the trabeculae are occupied by bone marrow. Trabeculae are thin and composed of irregular lamellae of bone with lacunae containing osteocytes. Lacunae are visible as tiny dark depressions on the bone. Osteoblasts are the cells responsible for bone formation. Once they cease activity and become embedded in bone matrix they are called osteocytes. Magnification: x35 at 6x7cm size.
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