part of part of Homo sapiens thoracic vertebra 10 zone of bone organ inferior costal facet of tenth thoracic vertebra 2026-03-19T00:00:00Z A zone of bone organ forming the inferior demi-facet on the posterolateral body of the tenth thoracic vertebra. In most individuals T10 bears a single complete costal facet rather than demifacets, but when present the inferior costal facet participates in articulation with the head of the tenth rib together with the superior costal facet of T11. David Osumi-Sutherland