What chest bones made up?

The chest bones, primarily the rib cage, are made up of ribs, the sternum (breastbone), and the thoracic vertebrae. The ribs consist of 12 pairs that connect to the spine at the back and curve around to attach to the sternum at the front via cartilage. The sternum is a flat bone located in the center of the chest and serves as an attachment point for the ribs. Together, these bones protect vital organs such as the heart and lungs while allowing for the expansion and contraction necessary for breathing.