contrerassharon21 contrerassharon21
  • 24-04-2020
  • Biology
contestada

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

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paytonnn05
paytonnn05 paytonnn05
  • 24-04-2020

Answer:

They have contact with the external environment.

Explanation:

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alyssacolon33
alyssacolon33 alyssacolon33
  • 29-04-2020

Answer: They have contact with the external environment.

Explanation: it good

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