What material makes up the bony thorax of the fetal pig?

The bony thorax of the fetal pig is primarily composed of ribs, the sternum, and the thoracic vertebrae. These structures are made of bone, which provides support and protection for the thoracic organs, such as the heart and lungs. The ribs are attached to the vertebrae at the back and curve around to connect to the sternum in the front. This framework helps to maintain the shape of the thoracic cavity during development.