title: Mucus in retrospect.
mesh_terms: D004064:Digestive System / Q000378:metabolism; D006023:Glycoproteins; D006801:Humans; D009093:Mucus / Q000378:metabolism; D012137:Respiratory System / Q000378:metabolism; D014566:Urogenital System / Q000378:metabolism
chemical_list: D006023:Glycoproteins