IleumRectumRectal NeoplasmsRectal DiseasesColonAnal CanalIntestinal MucosaGuinea PigsProctoscopyMuscle, SmoothMyenteric PlexusColon, SigmoidSigmoid NeoplasmsIntestinal PolypsIntestine, SmallIleal DiseasesGastrointestinal MotilityIleitisMuscle ContractionMegacolonProctitisRectal ProlapseColostomyIntestinesIleal NeoplasmsColonic NeoplasmsIntestine, LargeAdministration, RectalColonoscopyCecumIntestinal AbsorptionIleostomyDefecationDigestive SystemDuodenumDigestive System Surgical ProceduresColectomyAtropineColitis, UlcerativeCecal NeoplasmsColorectal NeoplasmsSigmoidoscopyAdenocarcinomaGastrointestinal HemorrhageEnemaColonic DiseasesRadiotherapy Planning, Computer-AssistedGastrointestinal TransitAnastomosis, SurgicalGastrointestinal TractSurgical StaplersAdenoma, VillousCrohn DiseaseConstipationColon, DescendingAnus, ImperforatePerineumIntestinal ObstructionDiphenylacetic AcidsDigestive System NeoplasmsIntestinal PerforationBrachytherapyRadiotherapy DosageGastrointestinal NeoplasmsUlcerEnteric Nervous SystemOrgans at RiskUrinary BladderAdenomaColon, TransversePelvisIntestinal DiseasesIleocecal ValveHexamethonium CompoundsElectric StimulationRectovaginal FistulaSwineFecesProctocolectomy, RestorativeIntestinal NeoplasmsPolyphloretin PhosphateFecal IncontinenceSubstance PPolypsVaginaNeoplasms, Multiple PrimaryRadiotherapy, Intensity-ModulatedTime FactorsColonic PolypsAcetylcholineBarium SulfateEnteritisPeristalsisScopolamine HydrobromideRabbitsStomachRadiation InjuriesGuanethidineAnus DiseasesHistamine