What classification do ribs 11 and 12 fall under?

Ribs 11 and 12 are classified as floating ribs because they do not attach to the sternum, nor do they have direct anterior attachments to other ribs. Floating ribs are typically shorter than true and false ribs and only attach to the vertebrae at the back. This anatomical structure allows for greater flexibility in the ribcage, which can be beneficial in providing movement and protecting vital organs.

In contrast, true ribs are directly connected to the sternum via costal cartilages, while false ribs share a more indirect connection or have no anterior attachment to the sternum at all. Cervical ribs, on the other hand, are anatomical variations that can occur but are not part of standard rib classification as they are not involved in the typical rib structure. Understanding these classifications is crucial in anatomy, particularly in the study of human skeletal structure and its implications in various fields, including athletic training.