Across
- 3. wavelike contractions that moves food
- 5. hormone that triggers sleepiness
- 7. what term refers to an unborn baby
- 9. helps move undigested waste materials
- 11. body's largest internal organ
- 14. gland secretes hormones that regulate metabolism
- 15. mineral vital in energy production
- 16. substances that neutralize free radicals
- 17. change from childhood to adulthood
Down
- 1. what gland is referred to as the "master gland"
- 2. doctor that treats digestive system
- 4. the hardest substances in the body
- 6. the "emergency action" hormone
- 8. study of the endocrine system
- 10. structure that forms between mother and baby
- 12. refers to the visible part of a tooth
- 13. three blood vessels that connect baby to mom