ewelch17041 ewelch17041
  • 02-12-2020
  • Chemistry
contestada

Help plz
Plz and ty
And also I am sry for posting to much I just don’t understand this test

Help plz Plz and ty And also I am sry for posting to much I just dont understand this test class=

Respuesta :

jazmindlo jazmindlo
  • 02-12-2020

Answer:

1st line of defense: non-specific natural barriers (physical and chemical barriers)

ex. skin membranes + mucus membranes

2nd line of defense: innate non-specific immune defenses (non-specific innate responses)

ex. fever + inflammation

3rd line of defense: antigen-specific immune responses (specific adaptive responses)

ex. antibodies + lymphocytes

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