2. A Inter Body Killer!

3. It is a white blood cell Destroy infection Is the core to immunity also known as T-lymphocyte They mature in the thymus (part of your neck) Divide into two types

4. Fight infection (viruses and cancer) Directly attack and destroy infections Part of the immune system Scan over everything

5. Mature in the thymus gland Divide into many different types Once mature all of the body More in the places with infection Travel through lymph vessels

6. Lymphocyte all look pretty much the same Functions very different Two types of t-cells CD4 CD8

7. B7 MHCcomplex CD28 CD4 CD8

8. If your number of t-cells is up.... 1. Acute lymphocytic leukemia 2. Infectious mononucleosis 3. Multiple myeloma

9. When you t-cell number is down 1. Aids 2. Acute viral infection 3. Cancer 4. Congenital T-cell deficiency 5. Hodgkin’s disease 6. Immunodeficiency disorder 7. Leukemias 8. Waldenstorm’s macroglobulinemia