STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Bone lacuna. Coloured scanning electron micrograph (SEM) of a lacuna (cavity) in a bone, filled with new bone mineral (red). A lacuna is a cavity within a bone that can contain an osteocyte, a cell that forms bone. An osteocyte has formed the new bone seen here.
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