Biology Task Andias

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Across
  1. 2. Carries blood into the heart
  2. 5. Blood is harder to clot
  3. 6. Upper part of the heart
  4. 8. Rich oxygen
  5. 9. Carries blood out of the heart
  6. 10. Lower part of the heart
Down
  1. 1. Low hemoglobin level
  2. 3. Rich carbon dioxide
  3. 4. Biggest artery
  4. 5. Protein that bonds with oxygen
  5. 7. Prevents blood backflow