where does the head of the rib attach
Rib cage Each rib consists of a head, neck, and a shaft, and they are numbered from top to bottom. The head of a rib is the end part closest to the spine with which it articulates. It is marked by a kidney-shaped articular surface which is divided by a horizontal crest into two facets. The superior facet is smaller and articulates with the vertebra above, and the inferior facet articulates with the vertebra of the same number. The transverse process of a thoracic vertebra also articulates with the rib of the same number. The crest gives attachment to the intra-articular ligament.[3] All ribs are attached posteriorly to the thoracic vertebrae.
Clavicle The collarbone is a large doubly curved long bone that connects the arm to the trunk of the body. Located directly above the first rib it acts as a strut to keep the scapula in place so that the arm can hang freely. Medially, it articulates with the manubrium of the sternum (breastbone) at the sternoclavicular joint. At its lateral end it articulates with the acromion, a process of the scapula (shoulder blade) at the acromioclavicular joint. It has a rounded medial end and a flattened lateral end.