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The first line of defense involves which structure(s)? O T-cells O skin O blood O B-cells Mark this andretum Next Submit
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5 votes
The first line of defense involves which structure(s)?

O T-cells
O skin
O blood
O B-cells
Mark this andretum
Next
Submit

User RobDil
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6.0k points

1 Answer

2 votes

Answer:

skin.

Step-by-step explanation:

the first line of defense uses physical parts such as skin.

User HolloW
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