Across
- 3. breaks down things
- 5. to balance all body systems to survive
- 7. carries blood away from the heart
- 9. hormone that increases sugar levels
- 12. controls the sugar in the blood
- 13. smallest type of blood vessel
- 14. a chemical reaction in any organ
- 17. doesn't require oxygen for respiration
- 18. too much thyroxin
Down
- 1. organ that helps digest food
- 2. simple to complex substances
- 4. requires oxygen for respiration
- 5. too little thyroxin
- 6. cell that generates chemical energy
- 8. affects chemical reactions in cells
- 10. another name for lung
- 11. carries oxygen and red blood cells
- 15. lack of iron in the blood
- 16. undigested food