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Across
  1. 3. cells carry oxygen
  2. 5. electrical measure of the heart
  3. 7. carry blood away
  4. 8. part of the heart dies
  5. 9. cells that fight
Down
  1. 1. largest artery
  2. 2. carry blood to
  3. 4. unit of study
  4. 6. heart stops beating