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Oliviapuente1
Oliviapuente1 Oliviapuente1
  • 16-02-2017
  • Health
Answered

what is the first line of defense

Verified Answer :

amariaaaa
amariaaaa amariaaaa
  • 20-02-2017

The first line of defence (or outside defence system) includes physical and chemical barriers that are always ready and prepared to defend the body from infection. These include your skin, tears, mucus, cilia, stomach acid, urine flow, 'friendly' bacteria and white blood cells called neutrophils.

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