Question

the sternum is composed of which type of bone?
long bone
flat bone
irregular bone
short bone

Explanation:

Flat bones are thin, flattened, and usually curved, providing protection and areas for muscle attachment. The sternum (breastbone) is a flat bone as it has a broad, flat shape and functions in protecting internal organs (like the heart and lungs) and serving as an attachment site for chest muscles. Long bones (e.g., femur, humerus) are longer than they are wide with a shaft and ends. Irregular bones have complex shapes (e.g., vertebrae). Short bones are roughly cube - shaped (e.g., carpal bones). So the sternum is a flat bone.

Answer:

B. Flat bone