TIM VERNON / SCIENCE PHOTO LIBRARY TIM VERNON / SCIENCE PHOTO LIBRARY
Degeneration of lumbar vertebrae. Illustration of a close-up of degeneration in the lumbar vertebrae. There are five lumbar vertebrae, forming the region of the backbone in the lower back. The vertebrae, seen from the front here), are normally smooth blocks of bone, but here have rough edges and bony outgrowths. This is due to degeneration of the intervertebral joints in conditions such as osteoarthritis.
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