Mucus in the lungs performs a function most similar to:

saliva in your mouth or mucus in your nose

Explanation:

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brainliest?

the relative standard reduction potential of the half-cell in which reduction occurs; more positive than the other half-cell. reduction is a chemical process in which electrons are added to an atom or an ion; it always occurs accompanied by oxidation of the reducing agent.

the answer to your question is tooth decay.