StomachDuodenal NeoplasmsStomach NeoplasmsDuodenal DiseasesStomach DiseasesDuodenal ObstructionBrunner GlandsIntestine, SmallJejunumGastrointestinal MotilityGastric MucosaPyloric AntrumIntestinal MucosaDuodenoscopyStomach UlcerPylorusIleumDuodenitisDigestive SystemIntestinal AbsorptionIntestinesMyoelectric Complex, MigratingPancreasDigestionSecretinHydrochloric AcidStomach, RuminantAmpulla of VaterDigestive System Physiological PhenomenaDuodenal UlcerPancreaticoduodenectomyGastric JuicePancreatic JuiceMuscle, SmoothGastrointestinal TransitRumenAbomasumEpirizoleMotilinGastrinsGastric AcidGastric EmptyingGastrointestinal TractCholecystokininEndoscopy, GastrointestinalVagotomyGastrectomyBicarbonatesIntestinal SecretionsIntubation, GastrointestinalEsophagusAnimal FeedUpper Gastrointestinal TractGastric FundusCommon Bile DuctGastric Outlet ObstructionGastritisVagus NerveColonGastrointestinal HemorrhageGastroscopyEnteropeptidaseChoristomaEnteroendocrine CellsIntestinal FistulaHydrogen-Ion ConcentrationBarium SulfateSphincter of OddiS100 Calcium Binding Protein GRats, WistarSuperior Mesenteric Artery SyndromeGastric FistulaHelicobacter pyloriGallbladderMetaplasiaSwineZollinger-Ellison SyndromeCalbindinsSomatostatinomaMuscle ContractionStomach RuptureDuodenostomyEndoscopyMyenteric PlexusEatingCysteamineMelenaImmunohistochemistryGastrointestinal HormonesHelicobacter InfectionsMuscle RelaxationDogsEndoscopy, Digestive SystemTrimebutineIntestinal NeoplasmsGhrelinAtropineTissue DistributionGastrointestinal ContentsTime Factors