Across
- 4. outer layer of skin
- 6. substance that causes the body to become immune to a particular disease
- 7. white blood cells that surrounds and destroys pathogens
- 8. pathogens that use a host cell of the body to reproduce
- 11. thick fluid which traps pathogens
- 12. inner layer of skin
- 13. white blood cell that acts as a messenger, makes antibodies, and destroys pathogens
Down
- 1. Y-shaped proteins which help the body develop immunity
- 2. hair-like projections which keep pathogens from getting into lungs
- 3. sign that the body is fighting an infection
- 5. pathogens that reproduce by making copies of themselves
- 9. oily substance produced by oil glands
- 10. the body's ability to protect itself from a particular disease