Which term matches the clue 'Breastbone'?

Which term matches the clue 'Breastbone'?

• A. Acromion
• B. Costa
• C. Trapezium
• D. Sternum

Answer: (D)

Breastbone is the sternum, the flat bone in the front middle of the chest that forms the central part of the rib cage. It anchors to the clavicles at the top and to the ribs via costal cartilages, helping protect the heart and lungs. The sternum has three parts—the manubrium, the body, and the xiphoid process—making it the clear term for the clue. The other names refer to different parts: the acromion is a shoulder blade projection, not the chest bone; the trapezium is a small wrist bone; and costa is the term for a rib, not the sternum.

Breastbone is the sternum, the flat bone in the front middle of the chest that forms the central part of the rib cage. It anchors to the clavicles at the top and to the ribs via costal cartilages, helping protect the heart and lungs. The sternum has three parts—the manubrium, the body, and the xiphoid process—making it the clear term for the clue.

The other names refer to different parts: the acromion is a shoulder blade projection, not the chest bone; the trapezium is a small wrist bone; and costa is the term for a rib, not the sternum.