Immune system

5. in the second level of defense, Eats pathogens in the blood steam (pac man)
6. A cell that matures in the thymus and is involved in an immune response that does not have to do with antibodies. It is referred as the HELPER.
10. A substance, such as penicillin or streptomycin, produced by or derived from certain fungi, bacteria, and other organisms, that can destroy or inhibit the growth of other microorganisms.
12. nearly colorless cells found in the blood, lymph, and lymphoid tissues, constituting of white blood cells (including B-cells and T-cells).
14. A Y-shaped protein on the surface of B-cells that is secreted into the blood or lymph in response to an antigenic stimulus, such as a bacterium, virus, parasite, or transplanted organ, and that neutralizes the antigen by binding specifically to it.
15. mast cells release this chemical which causes inflammatory of cells
16. Biological agent that can cause disease in the body.

1. The organ system that protects the body from outside biological influences.
2. The Destroyer
3. cell that matures in the bone marrow and secretes millions of specific antibodies that are tuned in to kill a certain germ.
4. Simple, completely independent, single-celled organisms that are able reproduce into many pathogens.
7. A cell that destroys bacteria and viruses.
8. First level of immune system defense
9. A small, non-living particle that infects/invades other cells in the body in order to reproduce itself.
11. Soft, fatty, vascular tissue that fills most bone cavities and produces new red and white blood cells.
13. A weakened form of a disease is injected into the body for the purpose of building up the immune system against it.