Intestine, SmallIntestinesIntestine, LargeDuodenal NeoplasmsIntestinal MucosaJejunumIleumIntestinal AbsorptionDuodenal DiseasesStomachDuodenal ObstructionGastrointestinal MotilityBrunner GlandsDigestive SystemDuodenoscopyColonIntestinal NeoplasmsDigestionMicrovilliDuodenitisEnterocytesMyoelectric Complex, MigratingDuodenumPancreasPylorusIntestinal SecretionsIntestinal DiseasesGastrointestinal TransitDigestive System Physiological PhenomenaPyloric AntrumCecumGastrointestinal TractSwineGastrointestinal ContentsGastric EmptyingSecretinPancreatic JuiceLiverTissue DistributionRumenRNA, MessengerMuscle, SmoothCholecystokininMyenteric PlexusAnimal FeedAbomasumGerm-Free LifeDuodenal UlcerEnteroendocrine CellsAmpulla of VaterGastrointestinal HormonesRats, WistarOrgan SpecificityAnimals, SucklingCaco-2 CellsPancreaticoduodenectomyEpitheliumSucraseJejunal NeoplasmsMotilinRats, Inbred StrainsS100 Calcium Binding Protein GBicarbonatesRats, Sprague-DawleyDisaccharidasesEnteropeptidaseEpirizoleSerous MembraneIntubation, GastrointestinalHydrochloric AcidEnteric Nervous SystemEnteritisImmunohistochemistryGastric MucosaFecesCalbindinsIntestinal PolypsHydrogen-Ion ConcentrationStomach, RuminantCattleEndoscopy, GastrointestinalMolecular Sequence DataTime FactorsMice, Inbred C57BLSubmucous PlexusBileJejunal DiseasesPeristalsisIntestinal FistulaGallbladderGastrointestinal HemorrhageCommon Bile DuctDogsBiological TransportDietCeliac DiseaseEatingGuinea PigsAdministration, OralNitrogen