- Created by: Jasmine.Li0278
- Created on: 05-11-18 19:51
The Immune System
Step One: Pathogens (all the same type) enter the body and they all have the same antigens on theie surface.
Step Two: Pathogens in the blood come into contact with lymphocytes. Different lymphocytes have differently shaped antibodies on their surface.
Step Three: Lymphocytes that have antibodies that match the antigens to the pthogen and become activated.
Step Four: Activated Lymphocytes divide rapidly to produce many identical copies (clones) with the same antibodies on their surface.
Step Five: Some of the lymphocytes release lots of antbodies into the blood.
Step Six: The antobodies attatch to the pathogens and cause them to die.
Step Seven: When all the pathogens are dead, a few memory lymphocytes remain in the blood.