SKELETAL SYSTEM
Across
- 2. Made of vertebrae
- 6. Protects the heart and lungs
- 7. Hardest substance in the body
- 8. Longest bone in the body
- 9. Muscles which we cannot control
Down
- 1. Strong tissues that bind the bones at a joint
- 2. Made of 22 bones
- 3. Fatty substance inside the bone
- 4. Framework of bones
- 5. Fiber which attaches muscles to bone