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

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

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

User NgocLK
by
8.3k points

1 Answer

4 votes

Answer:

Skin

Step-by-step explanation:

User NickyvV
by
7.6k points
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