Science Crossword

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Across
  1. 3. What removes waste energy from blood?
  2. 4. Helps circulatory system
  3. 5. Needed in the nervous system
  4. 7. Removes waste from blood
  5. 9. What is pumped with nutrients with help of the circulatory system?
  6. 10. The purifying system
  7. 11. What is a main structure in the circulatory system?
  8. 12. What can help the excretory system function efficiently?
  9. 13. dioxide Leaves the blood with help of respiratory system
Down
  1. 1. What system changes food into nutrients?
  2. 2. Used in digestive system
  3. 6. system What does sleeping well help?
  4. 8. The blood system
  5. 9. What is one of the main structures for the respiratory system?