Crossword

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Across
  1. 1. Allows movement in only one direction.
  2. 5. Large blood vessels that receive oxygenated blood.
  3. 7. A partition separating two chambers.
  4. 9. Located in the bottom left portion of the heart.
  5. 12. Responsible for pumping oxygen.
  6. 14. Small tubes
  7. 15. A large vein carrying deoxygenated blood to the heart.
  8. 16. The main artery of the body.
  9. 17. It transfers blood to other areas of the heart.
  10. 18. Branches in which bronchus divides.
Down
  1. 2. A small cavity
  2. 3. Rings in the trachea
  3. 4. It carrys blood form the right ventricle to the to the heart then to he heart for oxygenation.
  4. 6. A tube that has rings.
  5. 8. Cavity behind the nose and mouth.
  6. 10. Deoxygenated blood enters through there.
  7. 11. When swallowing it covers the opening of the wind pipe.
  8. 13. Vibrate to produce voice