Across
- 3. largest artery in the body
- 4. form blood clots
- 7. keep blood moving around heart
- 9. transport oxygen around the body
- 12. non-self structure that are bonded to pathogens and alert lymphocytes
- 13. produce antibodies that bond to antigens
- 17. vein that carries blood from the body to the heart
Down
- 1. smallest type of blood vessel where substance exchange occurs
- 2. fight pathogens
- 5. prevents and fights pathogens
- 6. contain digestive enzymes that digest pathogens within phagocytes
- 8. protective protein that recognises and attacks antigens
- 10. liquid that carries all cells
- 11. heart to lungs
- 14. lungs to heart
- 15. type of white blood cell that engulf pathogen and digest it
- 16. cells lymphocytes that remain in immune system after destroying pathogens, remembers pathogens if reinfection occurs