Blood

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Across
  1. 3. The clotting process
  2. 5. Houses a central iron atom
  3. 7. Resistance to flow
  4. 9. Lack of oxygen carrying capacity
  5. 12. The formation of red blood cells
  6. 13. Red blood cells
  7. 14. Helps to clot blood
  8. 15. Where cell production originates
  9. 16. Protein composed of four hemes
  10. 18. Cell responsible for the body's allergic response
  11. 19. Blood stem cells
Down
  1. 1. Fluid substance of whole blood
  2. 2. Shape of red blood cells
  3. 4. White blood cells
  4. 6. Device that spins blood to separate layers
  5. 8. Proteins that determine blood type
  6. 10. Low tissue oxygen concentrations
  7. 11. Bone marrow cells responsible for formation of platelets
  8. 12. Hormone that triggers cell production
  9. 17. Universal blood donor