part of part of Homo sapiens rib 6 non-articular facet of tubercle of sixth rib 2026-03-19T00:00:00Z A skeletal element projection forming the roughened, non-articular portion of the tubercle of the sixth rib that provides attachment for the lateral costotransverse ligament. It occupies the lateral part of the tubercle, distinct from the smooth medial articular facet, and faces posterolaterally. skeletal element projection David Osumi-Sutherland