Across
- 6. high contagious and can be spread from one person to another
- 7. respond to allergen
- 9. create white blood cells called T-cells
- 11. given usually as a shot
- 13. tiny little germs that require a host to multiply
- 14. marrow sponge tissue inside bones
- 17. clearance of infectious agents
- 18. recycles old blood cells
- 19. prevents pathogen growth
- 20. protects the body from infection
- 21. when antibodies that were produced in another organism
- 23. diseases that spread through unprotected sexual activities
Down
- 1. a substance that causes an allergic reaction
- 2. the outside of germs, like viruses
- 3. heating up liquids so bacteria in the liquid dies
- 4. traps pathogen
- 5. disease that are not spread from person to person
- 8. a chemical that destroys cancer cells
- 10. Immunity long lasting and should protect the body from future infections
- 12. attach themselves to the outside of the virus
- 14. living organisms that spread disease like animals
- 15. filter out germs that enter our lymphatic fluid through our blood
- 16. overly strong and cause the person discomfort
- 17. system bodies defense against germs
- 22. creates and protects goof bacteria