The Circulatory System

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Across
  1. 2. What stops blood from flowing the wrong way
  2. 5. The heart beats because of an area called the ___
  3. 6. Arteries carry this from the heart
  4. 9. What does the heart act like? A ___
  5. 11. Blood without oxygen is called?
  6. 12. A normal heart has 70 ___per minute
  7. 14. The force of each heart beat is measured as blood ___
  8. 15. The blood receives oxygen here
  9. 16. A blood vessel returning blood to the heart
Down
  1. 1. A type of heart chamber
  2. 3. A blood vessel taking blood away from the heart
  3. 4. Veins carry this back to the heart
  4. 7. The smallest blood vessel
  5. 8. A type of heart chamber
  6. 10. We can feel this at the wrist
  7. 13. Where in the lung does the circulation exchange gas