Answer: vertebrae

AnswerCrossword Clue
VERTEBRAESpine components
VERTEBRAECervical septet
VERTEBRAEParts of a column
VERTEBRAEFacet joints connect them
vertebraeEach of the series of small bones forming the backbone, having several projections for articulation and muscle attachment, and a hole through which the spinal cord passes