Which bone is known as the breastbone?

Which bone is known as the breastbone?

• A. Pelvis
• B. Sternum
• C. Radius
• D. Femur

Answer: (B)

The breastbone is the sternum, a flat bone at the front of the chest that forms the central part of the rib cage. It sits in the middle of the thorax and connects to the ribs via costal cartilage, helping protect the heart and lungs. The sternum has three parts: the upper manubrium, the central body, and the small xiphoid process. Pelvis refers to the hip bones in the lower pelvis, not in the chest. Radius is a forearm bone on the thumb side, and the femur is the thigh bone. None of these are called the breastbone, so the sternum is the correct term.

The breastbone is the sternum, a flat bone at the front of the chest that forms the central part of the rib cage. It sits in the middle of the thorax and connects to the ribs via costal cartilage, helping protect the heart and lungs. The sternum has three parts: the upper manubrium, the central body, and the small xiphoid process.

Pelvis refers to the hip bones in the lower pelvis, not in the chest. Radius is a forearm bone on the thumb side, and the femur is the thigh bone. None of these are called the breastbone, so the sternum is the correct term.