Across
- 3. ____ immunity is found in all animals and plants
- 4. ____ cells stimulate development of adaptive immunity in cells that contact the environment
- 6. are found throughout the body (agranulocytes)
- 7. ____ system consists of about 30 proteins that are activated by substances on microbe surfaces
- 10. discharge destructive enzymes
- 11. provide innate defense, interfering with viruses and helping activate macrophages
- 12. only ___ have adaptive immunity
- 13. insects rely on their exoskeleton that is composed of this as a physical barrier against infection
- 14. this enzyme in the digestive system breaks down bacterial cell walls
- 15. ___ traps allows removal of microbes
Down
- 1. agents that have potential to cause disease
- 2. cellular innate defenses in vertebrates also involve natural ___ cells
- 5. ____ circulate within hemolymph and carry out phagocytosis
- 8. circulate in the blood and are attracted by signals from infected tissues
- 9. Phagocytic cells recognize groups of pathogens by these PRRs