Each rib consists of a head, neck, and a shaft, and they are numbered from top to bottom. The head of a rib is the end part closest to the spine with which it articulates. It is marked by a kidney - shaped articular surface which is divided by a horizontal crest into two facets. The superior facet is smaller and articulates with the vertebra above, and the inferior facet articulates with the vertebra of the same number. The transverse process of a thoracic vertebra also articulates with the rib of the same number. The crest gives attachment to the intra-articular ligament. All ribs are attached posteriorly to the thoracic vertebrae.
where does the head of the rib attach
the spine