Immune System

3. Has specific binding sites that fit the shape of the antigens on the pathogen.
4. This system is not specific and is not developed over a lifetime. It does not provide immunity but is a second line of defense after the physical barriers.
6. White blood cells that destroy other foreign materials and cancer cells. Their other job is to take parts of dead pathogens and display them on their surfaces.
9. Cells like macrophages that activate helper T cells and cytotoxic T cells.
10. White blood cells that act as the first line of defense against virus-infected cells and cancer cells. This slows down the speed that viruses can reproduce but damages the body in the process.
11. Hair like projections on some cells that move back and forth and move mucus, and anything trapped in it.
13. How neutrophils and macrophages engulf pathogens and destroy them.
14. Are produced at the end of the process. They can provide immunity to the pathogen and make it much faster to activate antibody and T cells.
15. Produce a specialised protein called an antibody.

1. They destroy damaged or infected cells and can damage the body in the process.
2. They activate B cells and increase the effectiveness of cytotoxic T cells. Response is very specific to the pathogen.
5. skin, mucous membranes, cilia, body temp, pH.
7. This is the part of the immune system that gives long term immunity to a particular pathogen.
8. The most common type of white blood cell. Responsible for fighting bacterial and fungal infections. Produced in the bone marrow.
12. They divide rapidly when activated, some become plasma cells, the others become memory cells. Activated by the helper T cells.
13. Are infectious organisms or agents, including viruses, bacteria, fungi, and parasites.