Which term refers to the breastbone?

The sternum, commonly known as the breastbone, is a flat bone located in the center of the chest. It serves as a critical component of the ribcage, providing attachment for the ribs and protecting vital organs such as the heart and lungs. Anatomically, the sternum consists of three parts: the manubrium, body, and xiphoid process, which together form the structure that connects to the ribs through cartilage. Understanding this term is crucial in health science as it relates to both the skeletal system and the protection of thoracic organs.

In contrast, the clavicle is known as the collarbone, the scapula is referred to as the shoulder blade, and the ribcage consists of the ribs and their attachments, which encase the thoracic cavity. None of these terms accurately describe the breastbone itself, making "sternum" the correct and specific term for that particular bone.