Vertebral column or rachis (front view): bony axis of vertebrates, comprised of the set of vertabrae from the base of the skull to the pelvis.
Coccyx region: bone comprised of the fused, atrophied vertebrae at the end of the sacrum.
Sacral region (sacral curve): bone that is jointed with the hip bone to form the pelvis.
Lumbar region (lumbar curve): the part of the spine in the area of the loins (5 vertabrae).
Thoracic region (thoracic curve): the part of the spine in the area of the thoracic cage (12 vertebrae).
Cervical region (cervical curve): the part of the spine in the area of the neck (7 vertebrae).