part of part of Homo sapiens thoracic vertebra 12 zone of bone organ superior articular facet of twelfth thoracic vertebra 2026-03-19T00:00:00Z A zone of bone organ located on the superior articular process of the twelfth thoracic vertebra, facing posteriorly and oriented in the coronal or slightly oblique plane. It articulates with the inferior articular facet of T11; T12 is markedly transitional and its superior facets retain the thoracic orientation while the inferior facets adopt the lumbar pattern. David Osumi-Sutherland