Some Morphological Studies On The Stomach Of Some Birds

This work was carried out on 195 of adult birds of differentspecies of both sexes which were collected from the Zagazig villagesand fields. The birds were divided into three groups according to thetype of foods. Mixed food eating birds: which include thirty nineDuck (Anas domesticus) and thirty nine Goose (Anser anserdomesticus). Grain eating birds: which include thirty nine Pigeon(Columba livia). Worm and insect eating birds: which includethirty nine Ibis (Bubu1cus ibis ) and thirty nine Hoopoe (Upupaepops).The basic gross morphological features of all examined birdsrevealed that the stomach was formed of two chambers. The cranialchamber was the glandular stomach (Proventriculus) and thecaudal one was the muscular stomach (Ventriculus). The glandularstomach appeared as a direct continuation and dilatation of theesophagus without a line of demarcation in duck and goose while inpigeon, hoopoe and ibis separated from it by a constriction. The twodistinct parts of the stomach were separated by a constriction calledisthmus in duck, goose, pigeon and very short isthmus in hoopoe.While in ibis, Proventriculus connected caudally with Ventriculuswithout any external demarcation.Proventriculus had a typical elongated fusiform shape induck, dorsoventrally flattened oval shape in goose, cylindrical shapein pigeon, small elongated pear shape in hoopoe and large elongatedpear shape in ibis. Proventriculus of all examined birds occupied theleft half of the body cavity.