1. The Body’s Defense Against Infection

2. Pg. 450 The First Line of Defense Eyes Skin Stomach Mucous Membranes/Saliva

3. Immune System
A combination of body defenses made up of cells, tissues, and organs that fight off pathogens and disease
Immunity
Your body’s ability to resist the germs that cause a particular disease

4. Targets pathogen in a more specialized manner
Nonspecific Response
Specific Response
Inflammation or increased blood flow to the infected area
Specific white blood cells go to area and destroy pathogen
If spreads- causes fever which can slow pathogen
Triggers more WBC
Targets pathogen in a more specialized manner
Gives body ability to recognize same pathogen if it invades again
Vaccinations

5. Antigens- substances released by invading pathogens
Lymphatic System
A secondary circulatory system that helps the body fight pathogens and and maintains the fluid balance
Lymph and lymphocytes
B cells T cells
Antigens- substances released by invading pathogens
Antibodies-proteins released by B cells that attach to antigens , keeping them from harming the body
Antibodies are specific to each antigen and remain in blood in case of another infection

6. Immunity Natural immunity is present at birth Acquired Immunity
Antibodies pass from mom to baby
Breast feeding
Active immunity- antibodies you make
Vaccine
A preparation of dead or weakened pathogens that is injected into the body to cause the immune system to produce antibodies

7. Vaccination Schedule Pg. 453