Across
- 2. The bones that protect your lungs and heart.
- 4. Pumps blood throughout the body.
- 5. Contract or lengthen to move bones.
- 9. Attach muscles to your bones.
- 12. Means to straighten something.
- 13. The smallest part of the respiratory system.
- 14. Something's job.
- 16. The largest organ in the human body.
Down
- 1. A hard tube in the throat.
- 3. Supports your body and gives it shape.
- 6. Means to shorten something.
- 7. Protect your internal organs.
- 8. A mineral important for strong bones.
- 10. The bone that protects your brain.
- 11. The gas that humans breathe in.
- 15. Perform specific functions in the body.