Digestion and breathing

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