dani4klapagee dani4klapagee
  • 22-10-2016
  • Health
contestada

The first line of defense for keeping pathogens out of the body is the _____.
a. skin
b. antibodies
c. immune system
d. white blood cells

Respuesta :

coastermosterow85yi coastermosterow85yi
  • 16-01-2018
The Answer to this problem would be "A" Skin☺
Answer Link
tieganpickell tieganpickell
  • 07-12-2018

I just took the test and the answer is A

Answer Link

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