Biology

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Across
  1. 3. seal
  2. 4. watery
  3. 6. not enough oxygen
  4. 8. feel
  5. 9. keep the the blood in vein
  6. 13. blood
  7. 14. narrowest
Down
  1. 1. concentrated
  2. 2. waste
  3. 3. mixture
  4. 5. destroy
  5. 7. biconcave
  6. 10. bring blood
  7. 11. takeblood
  8. 12. transports