brayankfiguerall brayankfiguerall

18-03-2017
Health

contestada

Your _______ system must be on constant guard against invading bacteria, viruses, parasites, or other foreign substances to your body.
a. respiratory
b. excretory
c. integumentary
d. immune

Respuesta :

volpina volpina

18-03-2017

D, immune, if i'm not wrong.

Answer Link

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