Across
- 4. "master gland"
- 7. structure between mother and baby
- 10. movement of water (dissolved substances)into bloodstream
- 11. transition from childhood to adulthood
- 13. body's largest internal organ
- 14. hardest substance in the body
- 16. main energy source
- 19. breakdown of nutrients
- 20. doctor for digestive system
Down
- 1. holds the tooth in place, protects it
- 2. density proportion of nutrients compared to number of calories
- 3. "emergency action" hormone
- 5. common unit for measuring energy value of food
- 6. doctor for infants and children
- 8. acids building blocks to make proteins
- 9. fatlike substances, insoluble in water
- 12. visible part of tooth
- 15. process the body uses to burn food and generate energy
- 17. doctor for teeth
- 18. neutralize harmful molecules