Body's Line of Defense-Sheffa Kochay
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How does our skin protect use from pathogens?
There is a healthy bacteria called Normal Flora that live on a persons skin and use dead skin cells for energy.They prevent harmful bacteria called pathogens.
What does our white blood cells do and how do they kill germs?
White blood cells kill and eat germs & bacteria.
What is an antibody and how does it work?
An antibody is a blood protein that combine chemically with other substances like viruses,bacteria,and foreign substances in the blood.Antibodies latch onto them and sometimes kill them.
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