Immune System

1. collections of B-Cells and T-Cells throughout the body
6. A special type of cell that is attached to B-Cells as opposed to floating in the Blood
7. A type of blood cell that is made in the bone marrow
8. The site in the body where most of the cells of the immune system are produced
10. when a person is given antibodies to a disease rather than producing them through his or her own immune system.
11. acquired through the introduction of a killed or weakened form of the disease organism through vaccination.
13. A type of white blood cell that has 2 main types
14. exposure to a disease organism triggers the immune system to produce antibodies to that disease.
15. a toxin or other foreign substance which induces an immune response in the body
16. a protein component of the immune system that circulates in the blood, recognizes foreign substances like bacteria and viruses, and neutralizes them
19. A white Blood Cell that signals B-Cells to produce antibodies
20. A white Blood Cell that produces antibodies

2. acquired from exposure to the disease organism through infection with the actual disease.
3. disease that can be spread from one person to another
4. A type of white blood cell that surrounds and kills microorganisms, removes dead Antibodies and stimulates the action of other immune system cells
5. a disease that is not transmissible directly from one person to another
9. An organ located in the chest which instructs immature lymphocytes to become mature T-Cells
10. A germ that causes disease
12. collaboration between cells and proteins that work together to provide defense against infection.
17. A white Blood Cell that can attack any invading cell or virus.
18. the circulatory system