Across
- 2. Only part of the human body that cannot repair itself
- 6. Where red blood cells are created
- 7. Pigment that determines skin colour
- 9. Age that you stop growing
- 11. Number of chambers in the heart
- 13. Chemicals that causes changes to teenager's bodies as they grow into adulthood
- 14. Largest organ of the human body
Down
- 1. Muscle in the body that never tires
- 3. Hardest substance in the body
- 4. Largest bone in the human body
- 5. Largest gland in the body
- 6. Part of the body that doesn't feel pain
- 8. Part of the body that continues to grow throughout your life
- 10. Attaches muscles to the skeleton
- 12. Teeth used to grind food
