1. Aim: How does our immune system protect our body?
Do Now: What are ways you can prevent from getting sick?
Wash your hands, cover your mouth and nose when you cough and sneeze, clean cuts before applying bandage, eat a balanced diet, take a multi-vitamin, use protection

2. What causes disease?
An organism that causes an infection or disease is called a pathogen Types of pathogens include VIRUS, BACTERIA, FUNGUS, PROTOZOA

3. How does your body know that these pathogens are harmful???
Every organism’s cells have antigens
They act like name tags
Antigens have their own unique/specific shape
Allows your body to recognize things that don’t belong to or in you

4. These proteins are called antigens
Pathogens have proteins on their cell membrane, and these proteins have unique shapes.
These proteins are called antigens
antigen A
antigen A
antigen A
Pathogen A
antigen A
antigen A
antigen A

5. The body makes antibodies to fit the shape of these antigens.
antibody A
antibody A
antigen A
antigen A
antigen A
Pathogen A
antigen A
antigen A
antigen A
antigen A
antibody A

6. The body makes antibodies to fit the shape of these antigens
The body makes antibodies to fit the shape of these antigens. Produced by white blood cells to recognize pathogen that you’ve already been exposed to so you don't get sick from the same pathogen again
antibody A
antigen A
antibody A
antigen A
antigen A
antibody A
Pathogen A
antigen A
antigen A
antibody A
antibody A
antigen A
antibody A

7. WhiteBlood Cell White blood cells engulf (eat) pathogens. Pathogen A
antibody A
antibody A
antigen A
antigen A
antibody A
antigen A
Pathogen A
antigen A
antibody A
antigen A
antibody A
antigen A
antibody A

8. White Blood Cell Pathogen Antibody A antibody antigen antigen