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The objective of this study was to investigate the morphology on the proventriculus of African ostrich by observing the gross anatomy,light and electron microscope.The location,appearance,and histological characteristics of the proventriculus were observed on day 334.Our results revealed that the whole proventriculus was the appearance of the distensible sac-like,the stomach wall containeda large number of glands,which wall naked eye can see a lot of proventriculus nipples.