what does the thoracic rib articulate?
The bones that create the architecture of the thoracic cage include the sternum, the ribs, and the thoracic vertebrae. The sternum: The sternum is a flat, long bone that forms the medial and anterior part of the thoracic cage. It has three parts: Manubrium: The manubrium forms the upper part of the sternum. It articulates with the clavicles and attaches to the cartilage of the first two ribs. Body: This part of the sternum articulates with the costal cartilages of the 2nd through 7th ribs on its sides and with the xiphoid process.