NCIt definition : Any of thirty-three ring-shaped structures that form the vertebral column which surrounds
and protects the spinal cord. Each vertebra consists of a bony body with its superior
and inferior articular surfaces covered by hyaline cartilage. The body includes the
centrum anteriorly and vertebral arch posteriorly. The articular surfaces of the vertebrae
are connected by a fibrocartilaginous intervertebral disc.;