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Karo-lina-s [1.5K]
3 years ago
14

The first line of defense involves which structure(s)?

Health
2 answers:
Rus_ich [418]3 years ago
8 0
The first line of defense involves skin
Len [333]3 years ago
4 0

Answer:

Skin is your largest and first line of defense

Explanation:T-cells and B-cells are a third line defense. O is a blood type and not involved in the immune response, and your blood as a whole would not be the correct answer.

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