ElephantsStomachSound SpectrographyAcousticsVocalization, AnimalStomach NeoplasmsStomach DiseasesGastric MucosaStomach UlcerPyloric AntrumStomach RuptureGastric FundusStomach VolvulusGastrectomyDigestive SystemGastric JuiceGastrointestinal MotilityHelicobacter pyloriGastroscopyGastric AcidDuodenumGastritisGastrinsHelicobacter InfectionsStomach, RuminantPylorusGastric FistulaParietal Cells, GastricEsophagusStomach, AvianGhrelinGastric StumpGastrointestinal TractGastrointestinal NeoplasmsMetaplasiaPentagastrinAdenocarcinomaVagotomyMuscle, SmoothPeptide HormonesVagus NerveCardiaIntestine, SmallCarcinoma, Signet Ring CellPepsinogensChief Cells, GastricIntubation, GastrointestinalDigestive System Physiological PhenomenaGastric MucinsEsophagogastric JunctionBezoarsHydrochloric AcidAtropineEsophageal Diseases