Across
- 2. immunity; skin is an example
- 5. white blood cells
- 8. aka soldiers; they destroy the invaders
- 10. immunity is "borrowed" from another source
- 11. immunity develops throughout our lives
- 12. like the body's military intelligence
Down
- 1. WBC; chew up invading organisms
- 3. which fights bacteria
- 4. stay in case we have to fight the same germ
- 6. destroy antigens that are infected/changed
- 7. WBC; help body remember and destroy invaders
- 9. helps kill bacteria, viruses, infected cells