Natural Defense

5. A specialized protein that attaches to a specific pathogen to help destroy it.
7. Diseases that are not spread from person to person, such as cancer or heart disease.
10. A type of pathogen that cannot be treated with antibiotics and must be destroyed by the immune system.
11. A sticky substance in the nose and throat that carries pathogens to the stomach to be digested.
12. A substance that can kill bacteria or slow their growth.
16. A special cell that "remembers" a pathogen so the body can fight it faster the next time.
17. The body's ability to resist or recover from an infectious disease.
18. The body's "suit of armor" and first line of defense that sheds dead cells to remove pathogens.
19. Special chemicals in your eyes and mouth that destroy pathogens on contact.

1. A substance that helps your body develop immunity by "training" it with killed or weakened pathogens.
2. A microorganism, virus, or protein that causes disease.
3. The process of using heat to kill most of the bacteria in food or drink.
4. A rise in body temperature that helps the body fight certain types of pathogens.
6. A type of disease that can be passed from one living thing to another.
8. Parts of the blood that help seal an open wound so no more pathogens can enter.
9. An immune cell that plays a major role in coordinating the overall immune response.
11. An immune system cell that engulfs or "eats" microorganisms and viruses.
13. The process where blood flow increases to an injured area, causing it to swell and turn red.
14. The body system that fights pathogens using an "army" of individual cells and tissues.
15. An immune cell that is responsible for making antibodies.