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Which first-line defense system uses acids to kill pathogens? O A. circulatory OB. digestive O c. nervous OD. respiratory ASAP ASAP ASPA
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Which first-line defense system uses acids to kill pathogens?

O
A. circulatory
OB. digestive
O c. nervous
OD. respiratory



ASAP ASAP ASPA

User Dlongley
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2 votes
I think it’s respiratory but I’m not sure
User Jayyrus
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