Document Type : Basic Sciences
Authors
1
Department of Veterinary Medicine, Garmsar Branch, Islamic Azad University, Garmasar, Iran.
2
department of basic science , veterinary faculty , Semnann university , Semnan , Iran.
3
دانشکده دامپزشکی، دانشگاه سمنان، سمنان، ایران
Abstract
BACKGROUND: Ostrich belongs to the group of broad-breasted birds. Despite the many morphological similarities of this bird with other birds, it also has some differences from them. OBCECTIVES: Therefore, the aim of this study is to determine the process of organogenesis and histogenesis of the liver in ostrich. This study will be the basis for future studies in the field of experimental embryology. METHODS: In order to carry out this study, thirty-six fertilized ostrich eggs of 5, 9, 14, 20, 25, 30, 34, 38 and 41 days old (four samples from each age group) were selected and their livers were examined anatomically, histologically and morphometrically. The liver of the ostrich embryo was examined macroscopically and microscopically and compared with the embryos of birds such as chicken, pheasant, partridge, duck and turkey. RESULTS: In addition to the similarities between the liver of this bird and other birds, there were significant differences such as the division of the lobes, the shape of the lobes, the gallbladder, the time of final liver development, the time of the appearance of the first bile ducts, the time of the appearance of the first Kupffer cells, the color of hepatocyte cells and the number of cells of the Remak plates. CONCLUSIONS: Considering the species differences that exist between birds, the existence of anatomical, morphological and histological differences between the liver of this bird and other birds is understandable. In addition, there are differences in the times of development and appearance of organs between the ostrich and others. However, the liver of the ostrich embryo is somewhat similar to the embryos of other native birds.
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