third line of defence

• Third line of defence

  Specialized weapons that identify and destroy specific pathogens, and build long-lasting immunity against them
• Third line of defence

  • Made up of specialized white blood cells
  • Targets the specific pathogen that has invaded the body
  • Can develop an effective weapon against a particular pathogen
  • Can remember a pathogen if it ever shows up in the body again and use the same weapons to defeat it more quickly
• First two lines of defence

  Respond in a general way that treats all pathogens equally
• Third line of defence

  Targets the specific pathogen that has invaded the body
• Vaccines


  Putting diseases into someone's body, which the body fights and remembers, so it can respond better the next time the body is truly affected
• Germs go towards heat - it is cold and we are trying to warm up, so the germs are more likely to go towards us in order to warm up and multiply