part of part of Homo sapiens rib 9 non-articular facet of tubercle of ninth rib 2026-03-19T00:00:00Z A skeletal element projection constituting the roughened lateral area of the tubercle of the ninth rib that affords attachment for the lateral costotransverse ligament. It faces increasingly posterolaterally compared with upper ribs, reflecting the gradually changing orientation of the costotransverse articulation. skeletal element projection David Osumi-Sutherland