1. IMMUNE SYSTEM

2. Nonspecific Mechanisms
Physical barriers – skin, mucus, etc.
Macrophages – engulf foreign cells and particles
Natural killer cells – wa-ka
Histamine – causes inflammation

3. Specific Mechanisms Cell-mediated immunity – T cells provide defenses
Humoral immunity – B cells produce antibodies to provide defenses

4. T cells Killer T cells – Kill virus-infected or foreign cells
Helper T cells – Signals others to attack
Memory T cells – Store info on antigen structure
Suppressor T cells – inhibit helper T cells to prevent uncontrollable destruction

5. B cells Plasma cells – produce antibodies
Memory B cells – store information on antigen structure

6. Types of Immunity Naturally acquired – made by body
Artificially acquired – injected
Active immunity – from your body
Passive immunity – from someone else

7. Types of Immunity Naturally acquired active immunity
Naturally acquired passive immunity
Artificially acquired active immunity
Artificially acquired passive immunity

8. Diseases Immunodeficiency Autoimmune AIDS SCID Diabetes
Multiple Sclerosis (MS)