asked 96.3k views
1 vote
Which first-line defense system uses acids to kill pathogens?

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



ASAP ASAP ASPA

asked
User Dlongley
by
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1 Answer

2 votes
I think it’s respiratory but I’m not sure
answered
User Jayyrus
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8.0k points

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