The sternum, also known as the breastbone, is the only bone in the human body that is not paired.
The sternum is located in the center of the chest and acts as a point of attachment for the ribs, clavicles, and other muscles. It is a flat bone that is made up of three parts: the manubrium, the body, and the xiphoid process.
All other bones in the human body are paired, meaning that there are two of each bone, one on each side of the body. For example, the femur (thigh bone), tibia (shin bone), and fibula (lower leg bone) are all paired bones.
The sternum is an important bone in the human body, as it plays a role in protecting the heart and lungs. It also helps to support the rib cage and provides a point of attachment for the muscles of the chest and abdomen.