Uberon Taxon note : In humans: The coccyx, commonly referred to as the tailbone, is the final segment
of the human vertebral column. Comprising three to five separate or fused vertebrae
(the coccygeal vertebrae) below the sacrum, it is attached to the sacrum by a fibrocartilaginous
joint, the sacrococcygeal symphysis, which permits limited movement between the sacrum
and the coccyx.;