Release of 5-hydroxytryptamine (serotonin) from the dog's gastrointestinal tract.
D000818:Animals; D001769:Blood; D004285:Dogs; D041981:Gastrointestinal Tract / Q000378:metabolism*; D006801:Humans; D012701:Serotonin / Q000378:metabolism*
D012701:Serotonin
BLOOD; GASTROINTESTINAL SYSTEM/metabolism; SEROTONIN/metabolism