Across
- 2. Used to make energy.
- 4. Bones hold this mineral.
- 5. Thin outer layer.
- 8. Protects spinal cord.
- 9. Pull on bones to move.
Down
- 1. Make up the skeletal system.
- 3. Protects the brain.
- 4. Makes red blood cells.
- 6. Internal skeleton.
- 7. Protects the lungs and heart