First line of defence Flashcards

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1
Q
Physical barriers
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A
  • intact skin
  • cilia (little hairs on the throat)
  • Waxy cuticle epidermal cells (like intact skin for plants)
  • galls (cavities that form around pathogens on plants
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2
Q
Chemical barriers
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A
  • sebum (oil on skin)
  • stomach acid
  • lysozyme in tears and saliva
  • chemical in plants that kill pathogens
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3
Q

Biological barriers

A

-natural flora (bacteria in intestines and on skin)

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