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15 January, 04:09

A barrier made up of several layers that stops pathogens from entering the body is

a. the skin. b. white blood cells. c. cilia. d. mucus.

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Answers (1)
  1. 15 January, 04:20
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    A. The Skin

    Explanation:

    Skin forms a waterproof barrier that prevents pathogens from entering the body.
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