immune system

2. T cell a process that activates the helper T cell
7. proteins helps phagocytic cells binds tighter to pathogen and activating the phagocytes
8. proteins produced by B lymphocytes that specifically react with foreign antigen
9. source of the pathogen in the enviroment
12. disease a disease that is caused by a pathogen passed from one organism to another, disrupting homeostasis in the organisms body
15. the cause of infectious diseases
16. Nodes filter lymph for bacteria and tumor cells
17. large outbreak in a area and afflict many people
18. cytokine that causes an inflammatory response to an injury; resulting in redness, swelling, warmth and pain.

1. binds to neighboring cells and stimulates these cells to produce ativiral proteins which can prevent viral replication in these cells
3. type of white blood cell that is produced in red bone marrow
4. widespread throughout a large region, such as a country, continent, or the entire globe
5. postulates rules for demonstrating that an organism causes a disease
6. diseases some diseases, such as a common cold
8. substance that can kill the or inhibit the growth of microorganisms
10. Response white blood cells engulf foreign substances and body temperature rises.
11. fluid found in the lymphatic system
13. T cells destroys pathogens and release chemicals call cytokines
14. cells long living cells that are exposed to the antigen during the primary immune response