Circulatory System

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Across
  1. 4. Fluid that leaks out of capillaries (7)
  2. 7. Liquid part of blood (6)
  3. 8. The organ that pumps blood (5)
  4. 9. Smallest blood vessels (9)
  5. 11. Lower chamber of the heart (7)
  6. 12. Blood component that carries oxygen (11)
  7. 14. Type of blood cell involved in clotting (7)
  8. 18. Blood vessel that carries oxygen-rich blood to the body (7)
  9. 19. Heart muscle (9)
  10. 20. Blood vessels that supply the heart itself (9)
Down
  1. 1. Tiny blood vessels where gas exchange occurs (9)
  2. 2. Blood vessels that return blood to the heart (5)
  3. 3. Blood vessel that carries blood to the lungs (8)
  4. 5. Iron-containing protein in red blood cells (9)
  5. 6. CELL: Type of blood cell that fights infection (5,4)
  6. 10. Upper chamber of the heart (6)
  7. 13. CAVA: Main vein that carries blood from the lower body to the heart (4,5)
  8. 15. Main artery of the body (5)
  9. 16. Blood vessel that carries blood away from the heart (6)
  10. 17. Valve that prevents backflow of blood from the right ventricle to the right atrium (8)