Across
- 5. Immune systems go away after some time, so what do we need?
- 7. What has cells that perform specific functions?
- 9. Your body responds much faster and stronger the 2nd time it sees a(an)____?
- 10. What does the immune system help protect us against?
Down
- 1. Different people have different levels of ____ to certain diseases.
- 2. The immune system develops all kinds of ____ that help destroy diseases causing microbes?
- 3. It is possible to get antibodies from animals or people through ____?
- 4. Active immunity and ____ immunity are there two ways our body can fain immunity?
- 6. What do scientist call invaders that can cause diseases?
- 8. What do vaccines introduce that are already killed or modified so we don't get sick?