contrerassharon21 contrerassharon21

24-04-2020
Biology

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Which statement describes many of the structures involved in the first line of defense of the immune system?

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paytonnn05 paytonnn05

24-04-2020

Answer:

They have contact with the external environment.

Explanation:

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alyssacolon33 alyssacolon33

29-04-2020

Answer: They have contact with the external environment.

Explanation: it good

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