Across
- 2. Allow a human to breathe
- 3. Protects the heart and lungs
- 6. Longest bone in the body
- 7. Largest organ in the body
- 10. Weakest bone in the body (use a dash as a space)
- 12. Also commonly known as the funny bone
Down
- 1. Protective layer of the teeth
- 4. A fluid which allows the joints to move more easily
- 5. Connected to the spiral cord
- 8. Most people have 2 of these organ
- 9. Pumps blood into your body
- 11. Largest muscle in the body