Across
- 5. the immune system helps to protect us against ____ caused by tiny invaders
- 6. when ____ are detected , messages are sent out, warning that the body is being attacked
- 7. scientists call the ___ that can cause diseases, antigens
- 8. some of these cells are specificaly designed for a certian disease
- 9. ____ remembers antigens that have already attacked the body
- 10. these cells are found in the blood stream and are called _____
Down
- 1. these cells produce antibodies that bind to antigens and neutralize them
- 2. when we were born our bodies may already have some immunity
- 3. these cells help to get rid of good cells that have already been infected
- 4. ___ destroy cells that have been infected by the invader