Which bone is the breastbone?

Which bone is the breastbone?

• A. Sternum
• B. Olecranon
• C. Radius
• D. Scapula

Answer: (A)

The breastbone refers to the sternum, a flat bone located in the midline of the chest that forms the front part of the rib cage. It plays a protective role for the heart and lungs and serves as the attachment point for the first seven pairs of ribs through costal cartilage, helping to anchor the rib cage during breathing. The sternum is made up of three parts: the upper manubrium, the central body, and the small bottom tip called the xiphoid process. The other bones listed aren’t the breastbone: the olecranon is the bony point at the elbow, the radius is one of the two forearm bones, and the scapula is the shoulder blade. So the breastbone is the sternum.

The breastbone refers to the sternum, a flat bone located in the midline of the chest that forms the front part of the rib cage. It plays a protective role for the heart and lungs and serves as the attachment point for the first seven pairs of ribs through costal cartilage, helping to anchor the rib cage during breathing. The sternum is made up of three parts: the upper manubrium, the central body, and the small bottom tip called the xiphoid process. The other bones listed aren’t the breastbone: the olecranon is the bony point at the elbow, the radius is one of the two forearm bones, and the scapula is the shoulder blade. So the breastbone is the sternum.