In vertebrate anatomy, ribs (Latin costae) are the long curved bones which form the ribcage. In most vertebrates, ribs surround the chest (Greek:θώραξ, 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 Humans have 24 ribs (12 pairs). The first seven sets of ribs, known as "true ribs", are directly attached to the sternum throu… (More on Ribs)