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Across
  1. 3. White nail crescent
  2. 8. Lower heart chamber
  3. 9. Upper heart chamber
  4. 13. Liquid part of blood
  5. 16. Rhythmic expansion of an artery
  6. 18. Blood component for clotting
  7. 19. A red blood cell
  8. 21. Controls blood flow direction
  9. 23. Back of lower leg
  10. 25. Skin at nail base
Down
  1. 1. Carries oxygen in red blood cells
  2. 2. Largest artery in the body
  3. 4. Upper leg
  4. 5. Top of foot
  5. 6. Back foot
  6. 7. Inner hand
  7. 10. Finger joint
  8. 11. Bottom of foot
  9. 12. Blood-pumping organ
  10. 14. Carries blood away from the heart
  11. 15. Largest heart valve
  12. 17. Carries blood to the heart
  13. 20. Tiny blood vessel
  14. 22. Curve of foot
  15. 24. A white blood cell