Rib cage
The rib cage is the arrangement of ribs attached to the vertebral column and sternum in the thorax of most vertebrates, that encloses and protects the heart and lungs. In humans, the rib cage, also known as the thoracic cage, is a bony and cartilaginous structure which surrounds the thoracic cavity and supports the shoulder girdle to form the core part of the human skeleton. A typical human rib cage consists of 24 ribs in 12 pairs, the sternum and xiphoid process, the costal cartilages, and the 12 thoracic vertebrae.
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.