الفهرس 
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Abstract
The current study was performed on thirty adult apparently healthy native-mixed breeds of Rabbits (Oryctolagus cuniculus) as an herbivore model and domestic Cats (Felis catus domesticus) as a carnivore model of both sexes with the average body weight ranged from 2.500 – 3.500 kg. This study aimed to anatomically illustrate the morpho-topographic description of liver, spleen and pancreas with their duct system and their arterial and venous vasculature and to identify the ultrasonography of these organs in both animals especially the pancreas due to its surgical importance and little research data available and since these two species are the most commonly used as research models in human clinical medicine. All the animals used were already submitted to euthanasia after the sonographical studies. The animals divided as specimens for surface anatomy and for three anatomical techniques; radiograph, corrosion casting in addition to gross dissection. There were great differences in shape, length, thickness, weight and pattern of vascular supply and duct system of liver, spleen and pancreas between both animals. This investigation aims to study these three organs in details which may help with the planning and application of emerging intravascular interventional procedures.