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Year 2008 - Volume 28, Number 09
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Caracterização das membranas fetais em búfalas no terço inicial da gestação, p.437-445
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ABSTRACT.- Barbosa P.L.G., Melnic R.V., Morini A.C., Martins D.S., Morini-Junior J.C., Pereira F.T.V., Franciolli A.L.R., Favaron P.O., Ambrósio C.E. & Miglino M.A. 2008. [Characterization of the fetal membranes in buffalo cows in the first three months of gestation.] Caracterização das membranas fetais em búfalas no terço inicial da gestação. Pesquisa Veterinária Brasileira 28(9):437-445. Setor de Anatomia dos Animais Domésticos e Silvestres, Departamento de Cirurgia, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, Av. Prof. Dr. Orlando Marques de Paiva 87, Cidade Universitária, São Paulo, SP 05508-900, Brazil. E-mail: drimorini@usp.br
The aim of the study was to characterize the fetal membranes in buffalo cows (Bubalus bubalis, Linnaeus 1758) in the first 3 months of the gestation. The fetal membranes were analyzed gross and microscopically (light and ultrastructural analysis). The corion is a simple layer of circle cells, with spherical nucleus, named trofoblastics; there is another cellular type, named trophoblastic giant cells, with two or more nucleus. Both of them have many cytoplasmic and reticule endoplasmic vesicles on transmission electron microscopy. The allantoic has many vessels filled with eritrocytes, elongated cells which form a stratified simple epithelium. The amnion is transparent or sometimes whitish, consisting of a stratified simple epithelium. The main difference between the allantoic and amnion is that the latter is avascular. The yolk sac is an opaque membrane that disappears during gestation, and is the only membrane that is not in contact with the others; it presents three different types of cells which form three distinct layers (endoderm, mesothelium and mesenquimal). |
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