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The first line of defense involves which structure(s)? O T-cells O skin O blood O B-cells
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3 votes
The first line of defense involves which structure(s)?

O T-cells
O skin
O blood
O B-cells

User Sridharan
by
6.4k points

1 Answer

3 votes

Answer:

Skin

Step-by-step explanation:

User Daniel Pinheiro
by
7.5k points
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