title: Anatomy and physiology of erection: pathophysiology of erectile dysfunction.
mesh_terms: D007172:Erectile Dysfunction / Q000209:etiology / Q000473:pathology* / Q000503:physiopathology*; D006801:Humans; D008297:Male; D009130:Muscle, Smooth / Q000503:physiopathology; D018377:Neurotransmitter Agents / Q000502:physiology; D010410:Penile Erection / Q000502:physiology*
chemical_list: D018377:Neurotransmitter Agents