Across
- 4. the purpose of the immune system is to _______ the body
- 5. attacks infected cells
- 7. has pieces that destroys the invader
- 9. memorizes past attackers
Down
- 1. when you get used to something, you adjust to it
- 2. makes antibodies
- 3. help with getting rid of infected cells
- 4. tiny attackers that invade the body
- 6. gives microbs that are dead or modified to help the immune system
- 8. you get this when you are immune to something