asked 55.2k views
5 votes
Which of the following 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 Mong Zhu
by
9.1k points

1 Answer

3 votes
D, Mucous membranes are not within the body, thus they are the first of all the options that would encounter pathogens.
answered
User Spadelives
by
7.4k points
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