1. The smallest bone in the ear is the malleus.

2. Only humans have knees.

3. Most human bones break when the pressure applied to them is about 100 pounds per square inch.

4. As a person ages, the amount of calcium in the bones increases.

5. Bone remodeling involves two cell types.

6. Most bones grow from cartilage.

7. In the human body, joints are where the bones meet.