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