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Costal cartilage 9
Other Terms: Costal cartilage of rib, Cartilago costalis, Cartilage costal
The ninth costal cartilage is shorter and narrower than its predecessor. It ascends obliquely upward from the ninth rib and narrows to a pointed projection anteriorly, which attaches to the inferior margin of the eighth rib. The transversus abdominis muscle attaches to its anterior surface.