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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

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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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

asked
User Tcbrazil
by
8.9k points

1 Answer

2 votes
white blood cells which forms the immune system
answered
User Schadenn
by
8.0k points
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