- Afterswallowinganddigestingmedicines,ourbodiesexcretemetabolizedversionsofthemthroughurineandfeces.Thebronchisupplyairandpulmonaryarteriessupplybloodtothelungs.Togethertheytakeinairfromtheatmosphere,oxygenatetheblood,andexcretethecarbondioxidebackout...
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