Across
- 2. one function of a human skeleton
- 4. disease of a teenager skin
- 8. outer layer of the skin
- 10. the longest bone in our skeletal system
- 11. substance produced in a skin gland to keep the temperature constant
Down
- 1. the biggest teeth
- 3. illness caused by a louse
- 5. a tube between a mouth and a stomach
- 6. a bone in front of a rib cage
- 7. front teeth
- 9. the biggest digestive gland