Respiratory and Circular System Crossword

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Across
  1. 4. Blood vessels that carry blood back to the heart.
  2. 5. The system that helps us breathe.
  3. 6. The muscle that helps the lungs move when we breathe.
  4. 9. The voice box in the throat.
  5. 11. The tube that carries air to the lungs.
  6. 12. The organ that pumps blood around the body.
  7. 15. The upper chambers of the heart.
  8. 17. The gas we breathe in that our body needs.
  9. 18. Body part we use to smell and breathe through.
  10. 19. The movement of blood around the body.
Down
  1. 1. What we do when we take air into our body.
  2. 2. The lower chambers of the heart.
  3. 3. Tubes that carry blood around the body.
  4. 7. Blood vessels that carry blood away from the heart.
  5. 8. The opening we use to eat and also breathe.
  6. 10. The system that moves blood through the body.
  7. 13. dioxide The gas we breathe out.
  8. 14. The two organs in your chest that fill with air.
  9. 16. Tiny blood vessels where oxygen moves into the body’s cells.