Which structures are part of the body's first line of defense against pathogens? A. white blood cells B. red blood cells C. lymph nodes D. mucous membranes

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asked Nov 4, 2019 8.2k views

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Which structures are part of the body's first line of defense against pathogens?

A.
white blood cells

B.
red blood cells

C.
lymph nodes

D.
mucous membranes

Biology
middle-school

Tcbrazil asked

by Tcbrazil

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1 Answer

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white blood cells which forms the immune system

Schadenn answered Nov 9, 2019

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