Circulatory and Respiratory Systems Crossword

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Across
  1. 4. A red fluid
  2. 6. A component of blood that carries nutrients
  3. 9. An upper chamber of the heart
  4. 10. Windpipe
  5. 13. A cell in blood that carries oxygen
  6. 15. The part of the lung where oxygen goes into the blood
Down
  1. 1. You have two _____
  2. 2. The final portion of the heart
  3. 3. The back of the mouth
  4. 5. The voice box
  5. 7. A cell in blood that fights disease
  6. 8. The vessel that carries blood from the heart
  7. 11. These come off the trachea
  8. 12. The vessel that carries blood to the heart
  9. 14. You're not a mouth-breather, you're a ____-breather