Serotonin and gastrointestinal tract function.
D004063:Digestion; D041981:Gastrointestinal Tract / Q000502:physiology*; D006801:Humans; D012701:Serotonin / Q000502:physiology*
D012701:Serotonin
GASTROINTESTINAL SYSTEM/physiology; SEROTONIN/physiology