chrisaether chrisaether
  • 11-05-2017
  • Biology
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When foreign material enters the body, one way the immune system responds is by

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Ash1Diaz
Ash1Diaz Ash1Diaz
  • 11-05-2017
The Digestive System

: 3
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JustAddWater
JustAddWater JustAddWater
  • 11-05-2017
Pathogens may enter you but there is a layer (almost like a wall) that they will have to get through first (in the skin) bacteria can also kill pathogens. The immune system will produce antibodies that will also kill off pathogens.
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