2. Immunity = All the mechanism the body
uses to protect the body
from foreign agents
Innate = Protection you are born with
Acquired = Protection develop after birth
Hypersensitivity = Over-reacts
Autoimmunity = Attack normal cells

3. 1. Physical Barriers
Skin
Mucous Membrane
Respiratory system
Digestive system

4. 2. Cells
Macrophages

5. 3. Chemicals
Cl H
pH
Enzymes

6. 4. Fever
Kill germs with heat before body dies

7. Acquired Immunity - Cells
T Lymphocyte Cells - Kill specific germs
B Lymphocyte Cells - Make antibodies
Macrophages - Kill cells marked as bad

8. Acquired Immunity - Organs
Bone Marrow - Produces all blood cells
- Matures B Lymphocytes

9. Acquired Immunity - Organs
Thymus - Matures T Lymphocytes
90-95% of all cells killed