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First Line of Defense: Skin
Second Line of Defense: T-Cells
Go, go, go!
Third Line of Defense: Antibodies
Antigen : Large oval Antibodies: Arrows Arrows bind with its virus antigen which are the red triangles.
Our skin acts as a barrier, or wall, to keep chemicals and pathogens out of our body. Here, the pathogens are on the opposite side of the wall .
Killer T lymphocytes do the work of destroying the infected cells (blue circles). The Helper T lymphocytes coordinate the attack (white stars).
We were born to kill!
Antibodies, are proteins manufactured by the body that help fight against foreign substances called antigens. When an antigen enters the body, it stimulates the immune system to produce antibodies. The antibodies attach, or bind, themselves to the antigen and inactivate it. Memory B lymphocytes also take place here. They form memory cells that remember the same pathogen for faster antibody production in future infections.
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