Across
- 3. liquid component of the blood
- 5. metal in haemoglobin
- 6. a mesh that holds platelets together
- 9. shape of a red blood cell
- 12. gas carried by red blood cells
- 13. protein found in red blood cells
- 15. proteins that assist platelets
- 17. a waste product from the liver carried in the blood
Down
- 1. small cell fragments that allow blood to clot
- 2. a waste product from respiration carried in the blood
- 4. a sugar carried in the blood
- 7. white blood cell that binds to a foreign antigen
- 8. white blood cell that engulfs pathogens
- 10. protein produced by lymphocytes
- 11. unique molecule on a pathogen’s surface
- 14. white blood cell that gives long-lasting immunity
- 16. organelle not found in red blood cells