77.8k views
1 vote
The first line of defense involves which structure(s)?

T-cells
B-cells
blood
skin

2 Answers

5 votes

Answer: [B] Skin

Step-by-step explanation:

User Rfarias
by
8.7k points
3 votes

Answer:

Skin

Step-by-step explanation:

User Trojanfoe
by
8.1k points

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