kamiyahzanae427 kamiyahzanae427

04-06-2020
Biology

contestada

Why are external barriers important to our immune system?

Respuesta :

maryamkhajehaminian1 maryamkhajehaminian1

04-06-2020

Answer:

Maybe it was because external barriers can attack to our body and it can hurt us

Explanation:

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1000-900+50 1000+50=150 Thats your answer