has part has part continuous with continuous with in taxon capable of capable of gastric acid secretion Aves gizzard crop proventriculus Wikipedia:Proventriculus UBERON:0007357 GAID:1239 The glandular or true stomach of a bird that is situated between the crop and gizzard. BTO:0001136 SCTID:63897003 MESH:D011531 NCIT:C111301 consider extending to crocodilians. EMAPA has proventricular region fundic gastric gland stomach glandular region