Immune System

3. cells engulfing or "eating" pathogens in the body
9. tags on cells/pathogens that are used for identification purposes
11. line of defense whose purpose is to keep invaders out of the body; skin, mucus/cilia, saliva/stomach acid
14. method of protection by injecting antigens of pathogens so that your immune system can produce immunity
15. main responders in the third line of defense; made by B-cells
17. line of defense that responds once a pathogen invades the body; WBC's, interferons, inflammatory response
18. forms a shield against anything foreign to the body
20. type of cells that make up most of your body; found in the skin, lining vessels, and major organs
21. clean up cells after they have been killed
22. chemicals that destroy infected cells; released by killer T cells
23. category of medications that are used to treat allergic reactions; zyrtec, benedryl, Claritin
24. type of T-cell that organizes cell death and then calls the B-cells for them to clean up the killed cells

1. programmed or purposeful cell death
2. body system that serves as your defense to anything that invades your body
4. first responder in the second line of defense; type of WBC
5. when your body reacts to a false threat, such as dust or pollen
6. swelling of tissue due to increased blood flow to a site of injury
7. type of immunity passed down from mother's milk and placenta in mammals
8. anything that invades the body and can cause a disease
10. a type of shot/vaccine given after a long period of time to remind the body of pathogen
12. type of B-cells that recognize foreign particles during future exposures
13. traps particles to prevent them from entering the respiratory system
16. the number of years a tetanus shot is required to be taken
19. type of T-cell that releases cytotoxins to destroy cells that have been infected
23. type of immunity gained by the person through the formation of antibodies or through vaccines