Circulatory System Crossword Puzzle

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Across
  1. 3. The lower chambers of the heart
  2. 4. A chemical that makes blood red by using oxygen
  3. 5. This is what you breathe
  4. 8. A wall that seperates the heart into two parts
  5. 10. A muscle that pumps blood
  6. 11. The system of the blood flow
Down
  1. 1. The upper chambers of the heart
  2. 2. Tbes from the heart leading into the lungs
  3. 6. The largest blood vessel in the body
  4. 7. The beat of your heart (you can find your ____in your wrist)
  5. 9. A pale gold fluid that makes up little more than half of our blood