Across
- 1. Occurs when large proportion of the population is immune
- 3. Protein produced by plasma cells that binds specifically to a complementary antigen
- 4. Remains in blood after infection for long term immunity
- 5. Body's ability to defend against infectious diseases
- 7. Condition caused by HIV
- 8. Specific to just one antigen
- 10. Type of white blood cell that engulfs and digests pathogens by phagocytosis
- 12. Enzyme that converts fibrinogen into fibrin
- 13. Usually on the surface of pathogen
- 14. Make proteins called antibodies as part of the adaptive immune system
Down
- 2. Body's first line of defense against pathogens
- 6. Converted into fibrin
- 8. Specific immune response characterized by memory cells and targeted antibodies
- 9. Insoluble protein formed from fibrinogen
- 11. Released by platelets that initiates blood clotting cascade