Rib
Ribs are classed as flat bones which usually have a protective role in the body. Humans have 24 ribs, in 12 pairs. All are attached at the back to the thoracic vertebrae, and are numbered from 1–12 according to the vertebrae they attach to. The first rib is attached to thoracic vertebra 1 (T1). At the front of the body most of the ribs are joined by costal cartilages to the sternum. The ribs connect to the vertebrae with two joints, the costovertebral joints.
Pork ribs
Several different types of ribs are available, depending on the section of rib cage from which they are cut. Variation in the thickness of the meat and bone, as well as levels of fat in each cut, can alter the flavor and texture of the prepared dish. The inner surface of the rib cage is covered by a layer of connective tissue (pleura) that is difficult to cook tender; it is usually removed before marinating or cooking.