Heterie
Heterie Heterie
  • 21-02-2017
  • Health
contestada

Larry is taking a walk in the park. The pollen in the air makes him sneeze constantly. What line of defense is his immune system exhibiting?

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duhitzmay
duhitzmay duhitzmay
  • 21-02-2017
(A) first line of defense.
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