#Sternum (Greek στέρνον, sternon, "chest"; plural "sternums" or "sterna") or breastbone is a long flat bony plate located anteriorly to the heart in the center of the thorax. It connects to the rib bones via cartilage, forming the anterior section of the rib cage with them, and thus helps to protect the lungs, heart and major blood vessels from physical trauma. Although it is fused, the sternum can be sub-divided into three regions: the manubrium, the body, and the xiphoid process.
Sternum - [ster´num] a plate of bone forming the middle of the anterior wall of the thorax and articulating with the clavicles and thecartilages of the first seven ribs. It consists of three parts, the manubrium, the body, and the xiphoid process.