11th rib articulates with which of the following?

The 11th rib articulates primarily with the corresponding thoracic vertebra, T11. Unlike the upper ribs, which attach to the sternum or costal cartilage, the 11th rib lacks anterior attachment, earning it the designation of a "floating rib." This absence of direct connection to the sternum or costal cartilage distinguishes it from the lower ribs and underscores its unique articulation with the thoracic vertebrae.