Morfologia e vascularização arterial das glândulas tireóides em gansos domésticos

Objetivou-se estudar a morfologia e o comportamento das artérias que se destinam às glândulas tireóides, abordando seu número, origem e ordenação em 30 gansos domésticos (Anser domestica), injetados com Neoprene látex 450 corado e fixados em solução aquosa de formalina a 10%. As glândulas tireóides apresentam-se pares, ovóides e localizam-se na extremidade cranial da cavidade tóraco-abdominal, relacionam-se com o nervo vago, veia jugular e artéria carótida comum, e possuem em média de 0,97; 0,69 e 0,43 cm no antímero direito e 1,04; 0,62 e 0,38 cm no antímero esquerdo, para comprimento, largura e espessura, respectivamente. As glândulas tireóides recebem colaterais das artérias: carótida comum, cervical cutânea ascendente, esofagotraqueobronquial, esofágica ascendente, comum do nervo vago ipsilateralmente e ramo esofágico, sendo estes dois últimos somente para a glândula direita. O número de vasos variou de 1 a 5 vasos, sendo 2 vasos (15 casos, 50% ± 10) para o antímero direito e 3 vasos (12 casos, 40% ± 9,8) para o antímero esquerdo, o padrão mais freqüentemente observado. As artérias tireóideas cranial, média cranial, média, média caudal e caudal estiveram presentes no antímero direito em 29, 8, 8, 14 e 29 gansos respectivamente, e no antímero esquerdo em 28, 5, 14, 5 e 28 gansos respectivamente. Um único ramo, a artéria tireóidea, destinou-se a glândula em um animal à direita e em dois animais a esquerda.The present work aimed to study the morphology of the thyroid glands and the arterial behavior of their arteries, emphasizing number, origin and ordination of the vases in 30 domestic geese (Anser tames domestica). The animQals were injected with Neoprene latex "450" red-faced with specific pigment through the sciatic artery and fixed in aqueous solution of formalin 10%. In the animals studied the thyroid glands are even, oval and, when fixed, they have red chestnut color. These glands are located in the cranial extremity of the thoraco-abdominal cavity, linked with the vague nerve, jugular vein and common carotid artery and their topography may be variable in each antimere. The thyroid glands have in average 0.97, 0.69 and 0.43 cm in right side and 1.04, 0.62 and 0,38 cm in left side, to length, width and thickness, respectively. The arteries responsible to emit colateral branches to thyroid glands are: common cutaneous carotid arteries, cervical cutaneous ascendant, esophageal tracheal bronchial, esophageal ascendant, common of the vague nerve ipsilaterally and also for the branch esophageal, being these last ones only happened for the right gland. The vases number varied from 1 to 5, being 2 vases (15 cases, 50% ± 10) for the right antimere and 3 vases (12 cases, 40% ± 9,8), the model more frequently observed. The cranial, cranial middle, middle, caudal middle and caudal thyroid arteries were present in the right side in 29, 8, 8, 14 e 29 geese respectively, and in the left side in 28, 5, 14, 5 e 28 geese respectively. This was a unique vessel to gland, the thyroid artery, in one animal to right and in two animals to left side

Morphologic and morphometric aspects of the domestic geese trachea

The tracheal morphology of 31 domestic geese was studied in order to characterize the morphometric and macroscopic aspects. Domestic geese, adult, male and female, from regular breeders, were utilized. The animals were euthanized by chloroform inhalation and fixed in 10% formaldehyde in aqueous solution. The trachea was dissected, beginning caudal at the larynx, up to its bifurcation inside the coelomatic cavity. The results demonstrated that the goose trachea is formed by 144 ± 12 complete tracheal rings and that has a total length of 33 ± 2.7cm on average. The trachea lumen is ovulated, flattened dorso-ventrally, and cylindrical in the middle part. The morphometric data from goose tracheas in males and females did not differ statistically (P < 0.05), suggesting that with regard to these characteristics there is no sexual dimorphism in this species

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http://dx.doi.org/10.5007/2175-7925.2008v21n2p91Estudou-se a morfologia da traquéia de gansos domésticos, caracterizando seus aspectos macroscópicos e morfométricos. Para tanto, foram utilizados 31 gansos domésticos adultos, machos e fêmeas, oriundos de criadouros comerciais, os quais foram eutanasiados por meio de inalação de clorofórmio, seguindo-se fixação em solução aquosa de formol a 10%. A traquéia foi dissecada desde seu início, caudalmente à laringe, até sua bifurcação já na cavidade celomática. Os resultados mostraram que a traquéia dos gansos é composta por 144±12 anéis cartilagíneos completos, e em média possui 33±2,7 cm de comprimento. A luz da traquéia apresenta-se ovalada, com um ligeiro achatamento dorso-ventral, tornando-se cilíndrica caudalmente a partir do seu terço médio. Os valores morfométricos obtidos para machos e fêmeas adultos não mostraram diferenças estatísticas signifi cativas (p&lt;0,05), sugerindo que não há dimorfismo sexual evidente para as características analisadas.Morphologic and morphometric aspects of the domestic geese trachea. The tracheal morphology of 31 domestic geese was studied in order to charac- terize the morphometric and macroscopic aspects. Domestic geese, adult, male and female, from regular breeders, were utilized. The animals were euthanized by chloroform inhalation and fi xed in 10% formaldehyde in aqueous solution. The trachea was dissected, beginning caudal at the larynx, up to its bifurcation inside the coelomatic cavity. The results demonstrated that the goose trachea is formed by 144 ± 12 complete tracheal rings and that has a total length of 33 ± 2.7cm on average. The trachea lumen is ovulated, fl attened dorso-ventrally, and cylindrical in the middle part. The morphometric data from goose tracheas in males and females did not differ statistically (P &lt; 0.05), suggesting that with regard to these characteristics there is no sexual dimorphism in this species