This body region is protected by fatty acids, acidic pH, lactic acid, and a tough cell barrier with its own normal biota.
A. skin
B. respiratory tract
C. digestive tract
D. urinary tract
E. eyes
Answer: A
This body region is protected by fatty acids, acidic pH, lactic acid, and a tough cell barrier with its own normal biota.
A. skin
B. respiratory tract
C. digestive tract
D. urinary tract
E. eyes
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