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. - QAmmunity.org

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.

asked Mar 18, 2021 184k views

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