Rib 6

The rib 6 (sixth rib) is a curved, flat bone that consists of a head, neck, tubercle, and body.

The head of the sixth rib articulates with the bodies of the fifth and sixth thoracic vertebrae. The neck is a flattened portion that extends laterally from the head.

The tubercle, located at the junction of the neck and body, articulates with the transverse process of the sixth thoracic vertebra.

The body of the sixth rib is thin and flat, with a superior and inferior border.

The superior border is rounded and smooth, while the inferior border is sharp and contains the costal groove, which houses the intercostal vessels and nerve. Anteriorly, the sixth rib connects to the sternum via costal cartilage, contributing to the stability and flexibility of the thoracic cage.

The sixth rib is also significant in clinical anatomy as it is closely associated with the inframammary fold, an important landmark in breast surgery.