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Identify the body's "barrier" or "first lines of defense" that keep microorganisms from infecting the body.

Group of answer choices

Skin

Shoes

Saliva

Tears

Mucous membrane

Stomach acid

Teeth

Fingernails

2 Answers

4 votes
the skin...that makes sense
User Evdama
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4 votes
Skin, tears , mucous, are part of the first line of defence in fighting infection. They help to protect us against invading pathogens
User Jerry Zhang
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