Across
- 3. How fast you breathe
- 4. Used for growth and repair
- 5. Breaking up food molecules into smaller ones
- 7. The gas we need for respiration
- 9. The chemical reaction we use for energy
- 12. Our heart beats faster during...
- 15. Keep us healthy, in fruit and vegetables
- 16. The organ system we use to breathe
- 18. An organ full of acid
Down
- 1. The waste gas we breathe out
- 2. The organ where nutrients are absorbed
- 6. Give us energy, in bread and rice
- 8. Where respiration happens in the cell
- 10. Organs we use to breathe
- 11. How fast your heart beats
- 13. Speed up reactions in the body
- 14. We need respiration to give us...
- 17. Bones that protect our heart and lungs