JAMES STEVENSON / SCIENCE PHOTO LIBRARY. JAMES STEVENSON / SCIENCE PHOTO LIBRARY.
Photograph of the human coccyx, a small triangular bone consisting of four crude vertebrae fused together. The coccyx is the terminal bone of the vertebral column, articulating or fusing with the sacrum through the rudimentary transverse processes (bony projections) on the first coccygeal vertebra (top of image). The coccyx is seen in back view.
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