The Circulatory System

123456789101112131415161718
Across
  1. 2. Upper chamber of the heart
  2. 4. Regulates the pace of the heart
  3. 8. Makes up more than half your blood
  4. 9. Fights bacteria that make you sick
  5. 12. The liquid that moves around in blood vessels
  6. 13. The smallest blood vessel in the body
  7. 15. Carries blood away from the heart
  8. 16. To breathe out
  9. 17. Carries blood to the heart
  10. 18. The smallest item in your body
Down
  1. 1. Things that you need to live and grow
  2. 3. Carries oxygen throughout the body
  3. 5. A pump
  4. 6. Makes you sick
  5. 7. The lower chamber of your heart
  6. 10. A chemical messenger
  7. 11. An artery or vein
  8. 14. Helps your blood clot