RectumIntestine, SmallIntestinesIntestine, LargeDuodenal NeoplasmsIntestinal MucosaRectal NeoplasmsJejunumRectal DiseasesIleumIntestinal AbsorptionDuodenal DiseasesColonGastrointestinal MotilityStomachDigestive SystemDuodenal ObstructionBrunner GlandsAnal CanalIntestinal PolypsIntestinal NeoplasmsProctoscopyCecumDuodenoscopyGastrointestinal TransitDuodenumGastrointestinal TractIntestinal DiseasesDigestionMicrovilliSigmoid NeoplasmsDuodenitisColon, SigmoidEnterocytesMyoelectric Complex, MigratingGastrointestinal HemorrhageMuscle, SmoothColonic NeoplasmsDigestive System Surgical ProceduresPancreasPylorusIntestinal SecretionsMegacolonMyenteric PlexusDigestive System Physiological PhenomenaPyloric AntrumSwineProctitisFecesRectal ProlapseAdministration, RectalAdenocarcinomaEnteroendocrine CellsTissue DistributionEnteric Nervous SystemRNA, MessengerImmunohistochemistryColostomyGastrointestinal ContentsGastric EmptyingSecretinTime FactorsPancreatic JuiceLiverRumenAdenoma, VillousCholecystokininAdenomaEndoscopy, GastrointestinalEpitheliumIntestinal PerforationEnteritisGastrointestinal NeoplasmsAnimal FeedBarium SulfateOrgan SpecificityRats, WistarAbomasumIntestinal ObstructionColorectal NeoplasmsColonoscopyGerm-Free LifeDefecationDuodenal UlcerCecal NeoplasmsAmpulla of VaterGastric MucosaCattleGastrointestinal HormonesNeoplasms, Multiple PrimaryDigestive System NeoplasmsChickensAnimals, SucklingCaco-2 CellsAnastomosis, SurgicalPancreaticoduodenectomySucraseColitis, UlcerativeJejunal NeoplasmsMotilin