Circulation 2 Crossword

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Across
  1. 1. The blood cells involved in clotting
  2. 4. Where all blood cells are produced (two words)
  3. 5. Organelle that is absent in red blood cells
  4. 7. The lymph nodes contain many ____ blood cells which attack germs
  5. 8. One function of the lymph system is to return _____ fluid to the blood
  6. 10. When red blood cells get to the lungs they lose CO2 and gain ________
  7. 12. Red pigment which carries oxygen
  8. 15. Lymph _____ are located where germs are most likely to enter the body
  9. 16. Red blood cells are indented on both sides: what is the name for this?
  10. 18. One function of the lymph system is to transport these
Down
  1. 1. Clotting factor which is converted to thrombin by an enzyme from the platelets
  2. 2. Lymph is kept moving by the squeezing of ____________ muscles
  3. 3. Lymph vessels (lymphatics) have ________ to stop the lymph flowing backwards
  4. 6. Another name for red blood cells
  5. 9. Lymph vessels which absorb digested lipids in the small intestine
  6. 11. Clotting factor which is converted to fibrin by thrombin
  7. 13. The role of white blood cells
  8. 14. Lymph is cleaned up and is returned to the bloodstream by valves in the _______
  9. 17. Mineral salt in the blood which is essential for clotting