title: [The peptidergic system: an approximation].
mesh_terms: D005768:Gastrointestinal Hormones / Q000502:physiology*; D006801:Humans; D018377:Neurotransmitter Agents / Q000502:physiology*; D010455:Peptides / Q000502:physiology*; D013373:Substance P / Q000502:physiology
chemical_list: D005768:Gastrointestinal Hormones; D018377:Neurotransmitter Agents; D010455:Peptides; D013373:Substance P
vernacular_title: El sistema peptidérgico: una aproximación.