Intestine, SmallIntestinesIntestine, LargeIntestinal MucosaJejunumOrgan TransplantationTissue and Organ ProcurementIntestinal AbsorptionIleumOrgan SpecificityOrgan SizeMultiple Organ FailureDuodenumOrgan of CortiColonDigestive SystemLiverIntestinal NeoplasmsTissue DistributionMicrovilliIntestinal DiseasesEnterocytesCecumRNA, MessengerSwineMice, Inbred C57BLMolecular Sequence DataKidneyStomachGerm-Free LifeVomeronasal OrganEpitheliumGastrointestinal MotilityTime FactorsSubfornical OrganSerous MembraneImmunohistochemistryGastrointestinal TractRats, Sprague-DawleyCaco-2 CellsPelvic Organ ProlapseTissue DonorsEnteritisIntestinal SecretionsPaneth CellsBase SequenceRats, Inbred StrainsRats, WistarAnimals, SucklingSucraseAmino Acid SequenceMice, KnockoutDigestive System Physiological PhenomenaGastrointestinal ContentsFecesEpithelial CellsMyenteric PlexusAnimals, NewbornSpleenDisease Models, AnimalDisaccharidasesLymphoid TissueGene Expression Regulation, DevelopmentalMesenteryBiological TransportEnteric Nervous SystemGastrointestinal TransitPeyer's PatchesDigestionMice, Inbred BALB CTissue and Organ HarvestingIn Situ HybridizationGene Expression RegulationMice, TransgenicBrain DeathPancreasReverse Transcriptase Polymerase Chain ReactionGastrointestinal HormonesAnimal StructuresAdministration, OralLungRabbitsGene ExpressionVisceraCloning, MolecularMuscle, SmoothBody WeightCell DifferentiationJejunal NeoplasmsModels, BiologicalSignal TransductionFetusDietGuinea PigsEnamel OrganIleal NeoplasmsPeristalsisSpecies SpecificityChickensDNA, Complementary