Across
- 3. The first line of defense that covers your body.
- 4. The part of the body where blood cells are made.
- 6. An illness caused by germs.
- 8. A germ that needs a host to survive.
- 9. A shot that helps your body prepare to fight disease.
- 10. The organisms that can make you sick.
Down
- 1. The body's defense system that fights germs.
- 2. Proteins that recognize and attack germs.
- 5. Cells that help destroy bacteria and viruses.
- 7. A raised body temperature that helps fight infections.