Circulatory System Crossword Puzzle

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