RESUMO

As glândulas adrenais são estruturas bilaterais situadas na extremidade cranial dos rins, constituídas pela região cortical e medular, responsáveis pela secreção de hormônios e de fatores que interferem no metabolismo dos carboidratos, lipídeos e proteínas. Foram avaliadas neste estudo as artérias responsáveis pelo suprimento das glândulas adrenais de 22 suínos natimortos da linhagem Camborough 25, de ambos os sexos, coletados em núcleos criatórios da região de Brasília - DF. O leito arterial foi preenchido com solução aquosa a 50% de Neoprene Látex "450", corado com pigmento específico e fixados em solução aquosa de formaldeído a 10%. Em seguida, foi promovida a dissecação das artérias responsáveis pelo suprimento sanguíneo destas glândulas. Os dados obtidos foram analisados através do teste de normalidade Kolmogorov-Smirnov seguido pelo teste de Wilcoxon (p≤0,05). Diante dos achados, verificou-se que as glândulas adrenais direita e esquerda de machos e fêmeas foram supridas por ramos provenientes da aorta abdominal e das artérias celíaca, mesentérica cranial, lombares I, II e III dos respectivos antímeros. A artéria renal direita irrigou apenas a glândula adrenal direita em ambos os sexos e artéria lombar IV as adrenais de machos de ambos antímeros. Não houve interferência dos antímeros em relação aos vasos supridores das adrenais, independente do sexo e do tipo de ramos (p=0,469). Entretanto, verificou-se diferença significativa entre o suprimento das glândulas adrenais direita (p=0,013) e esquerda (p=0,022) quando relacionado ao sexo, independente da origem do ramo. Estes resultados demonstram que o suprimento arterial das glândulas adrenais em fetos suínos da linhagem Camborough 25 apresenta algumas particularidades, o que demonstra a diferença desta linhagem em relação aos animais domésticos e outras raças e linhagens de suínos.

Anatomically the adrenal glands are bilateral structures located at the cranial extremity of the kidneys, internally constituted by a cortical and a medullar region. These structures are responsible for the secretion of hormones and factors that interfere in the metabolism of carbohydrates, lipids and proteins. In this study were evaluated which arteries are responsible for the arterial blood supply of the adrenal glands in pigs. For this purpose, were used 22 stillborn fetuses of pigs from the lineage Camborough 25, of both sexes, collected from farms in the region of Brasília - DF, Brazil. The arterial system was filled with 50% aqueous Neoprene Latex "450" solution, stained with specific pigment and fixed in 10% aqueous formaldehyde solution. After this was promoted the dissection of the arteries responsible for the adrenal glands blood supply. Data obtained were analyzed using the normality test Kolmogorov-Smirnov followed by Wilcoxon test (p ≤ 0.05). Considering the results, it was found that the right and left adrenal glands of both males and females were supplied by branches from the abdominal aorta and celiac, cranial mesenteric, lumbar I, II, III and IV arteries of the respective antimers. The right renal artery irrigated only the right adrenal gland in both sexes and lumbar artery IV irrigated the adrenal glands of males in both antimeres. There was no interference of antimeres regarding the vessels which supply the adrenal glands, irrespective of gender and type of branches (p = 0.469). However, there was significant difference between the supply of the right (p = 0.013) and left (p = 0.022) adrenal glands when related to sex, regardless of the origin of the branch. These results demonstrate that the arterial blood supply of the adrenal glands in pig fetuses of the lineage Camborough 25 presents some peculiarities, which shows the difference of this lineage in relation to domestic animals and other breeds and strains of pigs.

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RESUMO

Background: The orange-spined hairy dwarf porcupine (Sphiggurus villosus) is a mammal found in Brazil, Venezuela, Guyanas and Bolivia. Its dorsum is yellowish brown and presents a great number of spines. There are no spines in the belly area, which is covered with softer fur. It can host ticks and louses, hemoparasites and endoparasites. This paper aimed to describe the lung lobation and the bronchial distribution of the orange-spined hairy dwarf porcupine. Materials, Methods & Results: The lungs of two orange-spined hairy dwarf porcupines, ran over by cars and with no damage in the viscerae, were used in the study. Animals were set with intramuscular and intravisceral injections of a 10% formaldehyde solution and further dissected. The right lung was bigger than the left one and presented cranial, middle, caudal and accessory lobes, and the cranial lobe was bilobated in cranial and caudal portions. The left lung presented cranial and caudal lobes, and the former was subdivided into cranial and caudal portions. The right main bronchus divided into three bronchi, one to the cranial, one to the middle and one to the caudal and accessory lobes. The right lobar bronchus gave origin to five segmental bronchi to the cranial portion and three segmental bronchi to the caudal portion; the middle lobar bronchus originated four segmental bronchi; the accessory lobe bronchus was originated from the right caudal lobe and divided into two segmental bronchi. The right lobar bronchus divided into eleven segmental bronchi. The main left bronchus bifurcated into one bronchus to the cranial lobe and one to the caudal lobe; the left cranial lobe bronchus divided into five to the cranial portion and two to the caudal portion; the left caudal lobe bronchus originated eleven segmental bronchi as well as the right one. Discussion: Markable interlobar fissures were noticed between lobes, similarly to the domestic carnivorous, to the crabeating raccoon (Procyon cancrivorus) and to wild rodents as agoutis (Dasyprocta azarae). There was a left lobe division, differently from the described in the crab-eating raccoon and horses, and similarly to the described in domestic carnivorous or in agoutis, capybaras (Hydrochoerus hydrochaeris) and pacas (Agouti paca). In all lobes, but the accessory lobe, lobar bronchi divided into several segmental bronchi, differently from the described in the right cranial and accessory lobes of the domestic carnivorous and of the crab-eating raccoon, and from the right middle lobe bronchus of the paca, which presented a bifurcated lobar bronchus. It also differed from the left cranial lobe of agoutis and pacas, which presented one or three segmental bronchi to this lobe, respectively. In the accessory lobe, there was a lobar bronchus bifurcating in segmental bronchi, as described in the domestic carnivorous and in the crab-eating raccoon. The bronchial distribution and lung lobation of the orange-spined hairy dwarf porcupine were different from the ones reported in domestic carnivorous and horses, wild rodents and from the crab-eating raccoon, with a markable division in the left and right cranial lobes, as in the domestic ruminants, from whom it differed due the absence of the tracheal bronchus.

Assuntos