Across
- 4. External tissue layer that is part of the first line of defense
- 7. Drug that fights bacterial infections
- 9. Helps the body produce antigens to fight certain diseases
- 11. Body mistakes something harmless as a serious threat
Down
- 1. Produce antibodies that recognize specific pathogens to help destroy them
- 2. Hair-like structures found on your nose
- 3. Proteins released by white blood cells to react with and destroy antigens
- 5. Thick secretion that exists in your nose
- 6. Also called white blood cells that surround and destroy pathogens
- 8. Being able to resist a certain disease
- 10. Recognize cells infected by a virus