» This article is about the bones called ribs. For other meanings, see rib (disambiguation). In vertebrate anatomy, ribs (Latin costae) are the long curved bones which form the ribcage. In most animals, ribs surround the chest (Latin thorax) and protect the lungs, heart, and other internal organs of the thorax. In some animals, especially snakes, ribs may provide support and protection for the entire body. Human anatomy Human beings have 24 ribs (12 pairs). The first seven sets of ribs have th… (More on Ribs)