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Silhouette differences among cats do not suggest a general selection for paedomorphosis
2013
Pares-Casanova, P.M., University of Lleida, 25198 Lleida, Spain
Paedomorphosis is the retention of juvenile morphology at maturity and is important in generating evolutionary change in domestic species and species in the wild. This preliminary study compared morphological characteristics of seven domestic cat pure breeds and felid species from around the world. An original procedure based on elliptical Fourier (EF) methods was applied to head lateral views of specimens and were assessed in order to analyse head profile. For comparative purposes three domestic kittens of different ages and three species of genus Lynx were also used. EF descriptors, allowed for the quantification of the head profile. Using the Fourier transform, reconstruction of the mean head profile revealed that there was a general shape difference between wild cats, domestic cats and kittens. Results suggested that variability in head profile differentiate quite well between adult cats and kittens, but domestic and wild cats appeared grouped into a similar cluster. The similarity between breeds can thus be attributed more to the general head profile than to flatness, i.e. to the general conformation rather than facial profile. Therefore, no effect of paedomorphism on the studied breeds can be undertaken. The present approach opens interesting ethnological perspectives for the aloidic characterisation for domestic breeds.
Show more [+] Less [-]Growth variation in skull morphology of Kuril harbor seals (Phoca vitulina stejnegeri) and spotted seals (Phoca largha) in Hokkaido, Japan
2009
Nakagawa, E., Hokkaido Univ., Sapporo (Japan) | Kobayashi, M. | Suzuki, M. | Tsubota, T.
We examined morphological growth variations in skull features between the Kuril harbor seal and the spotted seal in Hokkaido, Japan. Skulls from 80 Kuril harbor seals and 41 spotted seals were collected, and we measured 29 metric and 6 non-metric cranial characteristics. Three growth classes were defined according to the postnatal developmental stage: pups (0 year), subadults (1-4 years old) and adults (more than 5 years old). We detected sexual dimorphism in Kuril harbor seal pups, subadults, and adults. Although interspecies differences were detected in each growth class, Kuril harbor seals were larger and more massive than spotted seals; this feature was already detectable in pups. We did not detect certain cranial characteristics with which to identify the two species, but it was possible to identify any unknown specimens to their species, sex, and growth class using the cranial data generated in this study. Using 6 non-metric cranial characteristics, we identified significant interspecies differences with regard to the shape of the temporozygomatic suture and the extent of the nasal-incisive suture; the shape of the temporozygomatic suture and the shape of the nares were indicators of growth class in Kuril harbor seals. Although non-metric cranial characteristics have a lower discriminating power than metric characteristics, they are easy to use in the field even by inexperienced researchers.
Show more [+] Less [-]Development of bovine abomasum in prenatal period | Desenvolvimento do abomaso de bovinos no período pré-natal
2014
Gabriela Mansano do Nascimento | Silvia Helena Venturoli Perri | Roberto Gameiro de Carvalho | Cristina Maria Rodrigues Monteiro
<!--[if gte mso 9]><xml> <o:OfficeDocumentSettings> <o:AllowPNG/> </o:OfficeDocumentSettings></xml><![endif]--><p class="MsoNormal"><span style="mso-ansi-language: EN-US;" lang="EN-US">For this purpose, samples of Nelore fetus abomasum (Bos taurus indicus) were classified into five groups: 1 – fetuses with 9 to 15 weeks (8 to 21 cm) of gestation, 2 – fetuses with 16 to 22 weeks (23 to 37 cm), 3 – fetuses at 23 to 29 weeks (40 to 58 cm) 4 – fetuses with 30 to 36 weeks (61 to 77 cm) and 5 – fetuses with 37 to 43 weeks (79 to 88 cm). Histologic sections were stained with Hematoxylin and eosin, picrosirius and Mallory’s trichrome methods and examined under light microscopy. In fetus with 11 cm of length showed deep mucosa, wide folds and villi lined by single cylindrical epithelium, lamina propria, submucosa, muscular sublayers and serosa. Fetus with 13.5 cm, villi were evident and muscular layer of the mucosa was formed. At 16.5 cm, could be seen an increase in mucosa glands size and number. In fetus of 26 cm, showed gastric mucous glands at great number and ramifications. At 29 cm large folds, were observed. At 37 cm, showed glandular epithelium, muscular layer of the mucosa and muscular layer well development. Fetus with 42 cm, showed deep glands with corresponding mucous cells surrounding by thin lamina propria. It was concluded that the histomorphometric values of muscular layer and total abomasum wall were increased for all groups except for groups 4 and 5 which there was a decline of values, without presenting a significant difference and there was no continuous pattern of growth for other components of abomasum wall.</span><!--[if gte mso 9]><xml> <w:WordDocument> <w:View>Normal</w:View> <w:Zoom>0</w:Zoom> <w:TrackMoves/> <w:TrackFormatting/> <w:HyphenationZone>21</w:HyphenationZone> <w:PunctuationKerning/> <w:ValidateAgainstSchemas/> <w:SaveIfXMLInvalid>false</w:SaveIfXMLInvalid> <w:IgnoreMixedContent>false</w:IgnoreMixedContent> <w:AlwaysShowPlaceholderText>false</w:AlwaysShowPlaceholderText> <w:DoNotPromoteQF/> <w:LidThemeOther>PT-BR</w:LidThemeOther> <w:LidThemeAsian>X-NONE</w:LidThemeAsian> <w:LidThemeComplexScript>X-NONE</w:LidThemeComplexScript> <w:Compatibility> <w:BreakWrappedTables/> <w:SnapToGridInCell/> <w:WrapTextWithPunct/> <w:UseAsianBreakRules/> <w:DontGrowAutofit/> 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UnhideWhenUsed="false" Name="Colorful Grid Accent 6"/> <w:LsdException Locked="false" Priority="19" SemiHidden="false" UnhideWhenUsed="false" QFormat="true" Name="Subtle Emphasis"/> <w:LsdException Locked="false" Priority="21" SemiHidden="false" UnhideWhenUsed="false" QFormat="true" Name="Intense Emphasis"/> <w:LsdException Locked="false" Priority="31" SemiHidden="false" UnhideWhenUsed="false" QFormat="true" Name="Subtle Reference"/> <w:LsdException Locked="false" Priority="32" SemiHidden="false" UnhideWhenUsed="false" QFormat="true" Name="Intense Reference"/> <w:LsdException Locked="false" Priority="33" SemiHidden="false" UnhideWhenUsed="false" QFormat="true" Name="Book Title"/> <w:LsdException Locked="false" Priority="37" Name="Bibliography"/> <w:LsdException Locked="false" Priority="39" QFormat="true" Name="TOC Heading"/> </w:LatentStyles></xml><![endif]--><!--[if gte mso 10]><style> /* Style Definitions */ table.MsoNormalTable{mso-style-name:"Tabela normal";mso-tstyle-rowband-size:0;mso-tstyle-colband-size:0;mso-style-noshow:yes;mso-style-priority:99;mso-style-parent:"";mso-padding-alt:0cm 5.4pt 0cm 5.4pt;mso-para-margin-top:0cm;mso-para-margin-right:0cm;mso-para-margin-bottom:10.0pt;mso-para-margin-left:0cm;line-height:115%;mso-pagination:widow-orphan;font-size:11.0pt;font-family:"Calibri","sans-serif";mso-ascii-font-family:Calibri;mso-ascii-theme-font:minor-latin;mso-hansi-font-family:Calibri;mso-hansi-theme-font:minor-latin;mso-fareast-language:EN-US;}</style><![endif]--> | <!--[if gte mso 9]><xml> <o:OfficeDocumentSettings> <o:AllowPNG/> </o:OfficeDocumentSettings></xml><![endif]--><p class="MsoNormal"><span style="font-size: 10.0pt; line-height: 115%; font-family: 'MinionPro-Regular','serif'; mso-bidi-font-family: MinionPro-Regular;">Para esta pesquisa, amostras de abomaso de fetos da raça Nelore </span><em><span style="font-size: 10.0pt; line-height: 115%; font-family: 'MinionPro-It','serif'; mso-bidi-font-family: MinionPro-It;">(Bos taurus indicus) </span></em><span style="font-size: 10.0pt; line-height: 115%; font-family: 'MinionPro-Regular','serif'; mso-bidi-font-family: MinionPro-Regular;">foram divididos em cinco grupos: 1º – fetos com 9 a 15 semanas (8 a 21cm) de gestação, 2º – fetos com 16 a 22 semanas (23 a 37 cm), 3º – fetos com 23 a 29 semanas (40 a 58 cm), 4º – fetos com 30 a 36 semanas (61 a 77 cm) e 5º – fetos com 37 a 43 semanas (79 a 88 cm). Os cortes histológicos foram corados com Hematoxilina e Eosina, picrossirius e Tricrômico de Mallory e examinados ao microscópio de luz. No feto de 11 cm, observaram-se pregas mucosas largas, vilosidades revestidas por epitélio simples cilíndrico, lâmina própria, tela submucosa, túnica muscular com estratos interno e externo e serosa. Aos 13,5 cm, as vilosidades eram evidentes com formação da lâmina muscular da mucosa. Aos 16,5 cm, houve aumento em número e tamanho das glândulas mucosas. No feto de 26 cm, observou-se aumento das túnicas e ramificações das glândulas. Aos 29 cm, observou-se aumento no tamanho das pregas. Com 37 cm, houve aumento do epitélio glandular, lâmina muscular da mucosa e túnica muscular. Com 42 cm, as glândulas eram profundas com células mucosas e lâmina própria delgada. Concluiu-se que as os valores histomorfométricos da túnica muscular e parede total do abomaso foram crescentes para todos os grupos, com exceção dos grupos 4 e 5 para os quais houve queda dos valores, sem diferença significante e não houve crescimento contínuo para os demais constituintes da parede do abomaso.</span>
Show more [+] Less [-]Morphological differentiation of the epididymis of guinea pig (Cavia porcellus) at different ages | Morfologia do epidídimo de cobaio (Cavia porcellus) em diferentes fases do desenvolvimento pós-natal
2013
Bruno Cesar Schimming | Raquel Fantin Domeniconi | Maria do Carmo Panhoza Tse | Hero Gondinho Tse | Antonio Marcos Orsi
<p class="Default">The morphological evolution of the epididymal duct of guinea pigs (<em>Cavia porcellus</em>, L.) was studied on 10, 20, 30, 45, 60, 70, 90 and 100 days of age, being complex, which is due to the proper differentiation postnatal in the epididymal epithelium. Thus, it was observed that the initial segment of the epididymis reveals an increase of epithelial height corresponding to the average height of the main tubular epithelium cells, generally progressive after 45 days of age. The epithelial height in the middle segment were higher in younger stages (10 to 45 days) than in the prepubertal age (60 days), and have a decrease among 70 to 100 days of age. The ductular terminal segment starts a gradual decrease of the epithelial heights from puberal age (70 days), until adult age (90 to 100 days). In addition, this segment showed epithelial waviness that disappeared after 70 days of age, when the lumen fills it with sperm and cellular exfoliation. The cell types of the epididymal tubular epithelium, principal cells, basal cells and apical cells, were observed in all ages. In the epididymis of very young animals, there was a predominance of undifferentiated columnar cells. After 20 days of age, there was natural prevalence of the principal cells on other cell types, what is a feature similar to other mammals.</p> | <p class="Default">A evolução morfológica do ducto epididimário de cobaio (<em>Cavia porcellus, L.</em>) foi avaliada nas faixas etárias de 10, 20, 30, 45,60, 70, 90 e 100 dias após o nascimento, mostrando-se complexa, o que é decorrente da própria diferenciação pós-natal do epitélio epididimário. Assim sendo, o segmento inicial epididimário mostrou um aumento de altura epitelial correspondente aos valores médios de alturas das células principais do epitélio tubular, crescente após 45 dias de idade pós-natal. As alturas epiteliais obtidas em nível do segmento médio foram maiores em idades juvenis (de 10 a 45 dias) do que na idade pré-puberal (60 dias), tendo diminuído entre os 70 e 100 dias de idade. No segmento terminal epididimário, verificou-se um decréscimo marcante da altura epitelial tubular a partir da idade puberal (70 dias) até a idade adulta (a partir de 90 dias). Além disso, este segmento apresentou ondulações epiteliais que cessaram aos 70 dias de idade, momento em que a luz tubular se preenche com espermatozoides e esfoliações celulares. Os tipos celulares do epitélio tubular epididimário, células principais, basais e apicais, foram observados em todas as idades. Em epidídimos de animais muito jovens, observou-se a predominância de células colunares indiferenciadas. A partir de 20 dias de idade, houve prevalência natural das células principais sobre os demais tipos celulares, como é peculiar ao epitélio epididimário de mamíferos, de modo geral.</p>
Show more [+] Less [-]Development of the omasum of Nelore cattle (Bos taurus indicus) during the prenatal period | Desenvolvimento do omaso de bovinos da raça Nelore (Bos taurus indicus) durante o período pré-natal
2013
Gabriela Mansano do Nascimento | Silvia Helena Venturoli Perri | Roberto Gameiro de Carvalho | Cristina Maria Rodrigues Monteiro
<!--[if gte mso 9]><xml> <o:OfficeDocumentSettings> <o:AllowPNG/> </o:OfficeDocumentSettings> </xml><![endif]--><p class="MsoNormal"><span style="mso-ansi-language: EN-US;" lang="EN-US">The development of the stomach of domestic mammals is a complex process, especially in ruminants. The aim of this study was to analyze this organ during prenatal period. Omasum samples of Nelore fetuses (Bos taurus indicus) were divided into five groups of six samples each: 1- fetuses from 9 to 15 weeks (8 to 21cm) of gestation, 2 - fetuses from 16 to 22 weeks (23 to37cm), 3 - fetuses from 23 to 29 weeks (40 to 58cm), 4 - fetuses from 30 to 36 weeks (61 to 77cm) and 5 - fetuses from 37 to43 weeks (79 to 88cm). The histological sections were stained with Hematoxyl in and Eosin and Picrossirius and examined by light microscopy. In fetuses of 11 cm it was observed mucosa with uniform primary, secondary and tertiary blades and all layers present. The fetus with 13.5 cm presented quaternary blades emergence, papillae on primary and secondary blades and formation of the muscularis mucosae. At 28 cm it were observed papillae in development, as well as the blades, especially the quaternary. In 42 cm fetuses was early epithelial keratinization and at 56 cm it was fully keratinized. In 60 cm fetuses the blades presented large papillae with tapered apex and at 65 cm there was decreased epithelium and increase of the muscle layer. In the fetus of 83 cm it were observed thin sections, discrete muscularis mucosa and papillae over the entire organ surface. It was concluded that the blades and papillae were structures that presented more changes during fetal development.</span></p> | <!--[if gte mso 9]><xml> <o:OfficeDocumentSettings> <o:AllowPNG/> </o:OfficeDocumentSettings> </xml><![endif]--><p class="MsoNormal">O desenvolvimento do estômago de mamíferos domésticos é um processo complexo, especialmente em ruminantes. Essa pesquisa analisou o desenvolvimento desse órgão durante o período pré-natal. Foram utilizadas amostras de omaso de fetos da raça Nelore (Bos taurus indicus) divididos em cinco grupos com seis amostras cada: 1º – fetos com 9 a 15 semanas (8 a 21cm) de gestação, 2º – fetos com 16 a 22 semanas (23 a 37cm), 3º – fetos com 23 a 29 semanas (40 a 58cm), 4º – fetos com 30 a 36 semanas (61 a 77cm) e 5º– fetos com 37 a 43 semanas (79 a 88cm). Os cortes histológicos foram corados com Hematoxilina e Eosina e Picrossirius e examinados ao microscópio de luz. No feto de 11 cm, foi observado mucosa com lâminas primárias, secundárias e terciárias uniformes e demais camadas presentes. No feto de 13,5 cm surgiram as lâminas quaternárias, papilas nas lâminas primárias e secundárias e a formação da muscular da mucosa. Aos 28 cm, as papilas estavam em pleno desenvolvimento, assim como as lâminas, principalmente as quaternárias. No feto de 42 cm houve início de queratinização epitelial e, no de 56 cm, estava totalmente queratinizado. No feto de 60 cm, as lâminas possuíam papilas grandes e afiladas no ápice e, aos 65 cm, houve diminuição do epitélio e aumento da camada muscular. O feto de 83 cm apresentou lâminas delgadas, muscular da mucosa discreta e papilas por toda a superfície. Concluiu-se que as lâminas e papilas foram as estruturas que mais apresentaram modificações durante o desenvolvimento fetal.</p>
Show more [+] Less [-]Morphological patterns and malignancy criteria of transmissible venereal tumor in cytopathological and histopathological exams | Padrões morfológicos e critérios de malignidade do tumor venéreo transmissível aos exames citopatológico e histopatológico
2013
Caroline Rocha de Oliveira Lima | Rogério Elias Rabelo | Valcinir Aloisio Scalla Vulcani | Adriana Pereira Furtado | Panmera Almeida Helrigel | Luiz Augusto Batista Brito | Veridiana Maria Brianezi Dignani de Moura
Este estudo teve por objetivo identificar os padrões morfológicos e os critérios de malignidade do TVT aos exames citológico e histopatológico e relacionar essas características à evolução clínica e à resposta à quimioterapia. Dos animais estudados, dezesseis cães eram fêmeas e quatro machos. A idade dos animais variou entre um e dez anos de idade. Quanto à raça, 80% dos cães eram sem raça definida e 20% de outras raças. Constatou-se que as amostras citológicas permitiram melhor caracterização do tipo celular do que as histológicas. O TVT tipo plasmocitoide foi o de maior ocorrência, seguido pelos padrões linfocitoide e misto. Não houve diferença entre os escores estabelecidos para os critérios de malignidade e os tipos do TVT. Nenhum tipo morfológico do TVT diferiu quanto à resposta quimioterápica, mas o TVT apresenta particularidades morfológicas que podem interferir no comportamento tumoral, especialmente aquelas relacionadas à maior agressividade, e que são observadas no TVT plasmocitoide. | The aim of this study was to identify morphological patterns and malignancy criteria of the TVT in cytopathological and histopathological evaluations and relate these characteristics to clinical evolution and response to chemotherapy. Regarding studied animals, sixteen dogs were female and four were male. The age of the animals ranged between one and ten years old. Considering breed, 80% of the dogs were mongrel dogs and 20% were of other breeds. It was found that the cytological samples allowed a better characterization of the cell type than histological ones. The plasmacytoid was the most common morphological type of TVT, followed by the lymphocytoid and mixed standards. There was no difference among the scores for the malignancy criteria and morphological types of TVT. Regarding response to chemotherapy, no morphological type of the TVT showed any difference, but the TVT presents morphological peculiarities that may interfere with tumor behavior, especially those related to increased aggressiveness and that are observed in the plasmacytoid TVT.
Show more [+] Less [-]Architectural features of the aortic wall of Cebus apella monkey at the thoracic segment and at some abdominal segments: a light microscope study | Arquitetura da parede vascular de segmentos torácico e abdominais da aorta de macaco prego (Cebus apella)
2009
Josiane Medeiros de Mello | Antonio Marcos Orsi | Robson José de Souza Domingues | Sônia Lucy Molinari | Angela Maria Marcone de Araujo
The intimal layer of the thoracic and abdominal aortic segments of Cebus apella monkey presented an evident inner elastic lamina. The medial layer of the thoracic aorta segment showed a basic lamellar elastic pattern having a medium average of 23.12 lamellae per analyzed cut sections, which appeared disposed circular and oblique relatively to the aortic lumen. The aortic adventitial layer, at this level, was formed mainly by collagen fibers, irregularly disposed between elastic fibers and smooth muscle cells. The aortic abdominal portion, in this monkey, at the suprarenal level presented a medium number of 19.12 elastic lamellae which showed a relatively disorganized and broken up pattern. At the infrarenal level the aortic medium layer showed a medium average of 11.75 elastic lamellae and next to the emission of the internal iliac arteries it was found only a middle average of 8.37 elastic lamellae intermingled with smooth muscle cells and collagen fibers whose concentration seemed to be increased next to the adventitial layer. The external elastic lamina was only present in the more distal aortic segment near to the emission of the internal iliac arteries. | O segmento torácico da aorta em macaco prego apresentou na túnica íntima uma lâmina elástica interna evidente, estando também presente em todos os segmentos aórticos abdominais analisados nesta espécie. A túnica média aórtica, ao nível torácico, mostrou uma quantidade média de 23,12 lâminas elásticas, tendo disposição circular e oblíqua em relação à luz vascular, e a túnica adventícia apareceu formada por fibras colágenas, dispostas irregularmente entre uma quantidade relativamente menor de fibras elásticas e de fibras musculares lisas. A túnica média do segmento abdominal aórtico, neste primata, observada ao nível supra-renal, apresentou em média 19,12 lâminas elásticas que apareceram relativamente desorganizadas e fragmentadas. Ao nível aórtico infra-renal, foram evidenciadas, na túnica média 11,75 lâminas elásticas, em média, e próximo da emissão das artérias ilíacas comuns a túnica média aórtica tinha cerca de 8,37 lâminas elásticas, as quais estavam entremeadas por fibras musculares lisas e por fibras colágenas que aparentavam aumentar a sua concentração próximo à adventícia. A lâmina elástica externa só foi visível no segmento abdominal aórtico mais distal, ou seja, próximo da emissão das artérias ilíacas comuns.
Show more [+] Less [-]Linfoma canino de células T: aspectos epidemiológicos, clínicos e morfológicos de 38 casos | Canine T - cell lymphoma: a morphological, epidemiologic and clinical study of 38 cases
2007
Kleber Moreno | Ana Paula Frederico Rodrigues Loureiro Bracarense
O objetivo deste trabalho foi avaliar a ocorrência e aspectos clínicos, morfológicos e imunoistoquímicos de linfomas caninos de células T. Foram avaliados 71 cães com linfoma, dos quais 38 foram classificados imunoistoquimicamente como células T. Conforme a classificação da Working Formulation e Kiel 18 foram classificados como grau intermediário de malignidade, 15 de alta malignidade e 5 de baixa malignidade. O padrão de proliferação linfomatoso foi difuso em todos os animais (38). O linfoma de células T foi mais comum em cães de raça definida (24/38), como Boxer, Cocker Spaniel Inglês e Rottweiler. A ocorrência de linfoma T em machos (21/38) foi maior do que em fêmeas e a idade média foi de 5,8 anos (1-13 anos). Quanto à classificação anatômica e estadiamento clínico do linfoma de células T, a forma multicêntrica (29/38) foi a mais comum e os estádios IV (15/38) e III (14/38), respectivamente. | The aim of this study was to evaluate the incident and clinical, morphological and immunological aspects of canine T-cell lymphomas. From 71 canine lymphomas, 38 were classified by immunohistochemistry as T-cell lymphomas. According to the Working Formulation and Kiel classification, 18 were classified as intermediate-grade, 15 as high-grade and 5 as low-grade. The pattern of lymphomatous proliferation was diffuse in all 38 animals. T-cell lymphoma was more common in defined breeds (24/38), such as Boxers, English Cockers and Rottweilers. The occurrence of T-cell lymphoma in males (21/38) was greater than in females and the median age was 5.8 years (1 to 13 years). For the anatomical classification and the clinical staging of T-cell lymphomas, the most common were multicentric form (29/38) and stage IV (15/38) and III (14/38), respectively.
Show more [+] Less [-]Topography, morphology and the irrigation of the spleen in Trachemys scripta elegan, (WIED, 1838) | Topografia, morfologia e irrigação do Baço em Trachemys scripta elegans (WIED, 1838)
2007
Marcelo Domingues de Faria | Alan Peres Ferraz de Melo
This study was conduct using 20 turtles specie Trachemys scripta elegans, which 2 young females, 4 adults females, 8 young males and 6 adults males. Initially, it was took the hoof belly and, isolating the heart to identify more precisely the arteries was injected latex solution with red pigment through aorta descendens with one thin tube before aorta's bifurcation. After the latex injection, all the animals were submerged in 20% formaldeid water solution by a period of more than 72 hours. After that period, the arteries responsible by spleen irrigation were dissected. It was found in 30% of the cases the spleen was positioned behind colon transversum; and in 70% in front of colon transversum. Regarding the spleen irrigation, it was observed in 100% of the cases that arteria lienalis had its origin in arteria mesenterica cranialis. Which 30% had irrigation only by arteria lienalis. In 40% the irrigation was done by arteria lienalis and small branches of arteria colica sinistra. In 5% of the cases it was irrigated by arteria lienalis and by na unique branch sent by one of arteriae jejunales. In 5% of the cases the irrigation through arteria lienalis and by one branch of arteria pancreaticaduodenalis cranialis, and also by one artery with origin in the common trunk from arteriae jejunales. In 15% from the animals, irrigation was done by arteria lienalis and by branches from arteria pancreaticaduodenalis cranialis. In 5% of the cases the spleen was irrigated just by ramifications of arteria colica sinistra. | Utilizou-se vinte tartarugas da espécie Trachemys scripta elegans, sendo duas fêmeas jovens, quatro fêmeas adultas, oito machos jovens e seis machos adultos. Inicialmente, retirou-se o plastrão, isolando-se o coração e, já na aorta descendente, introduziu-se uma cânula antes da bifurcação da aorta para injeção de solução de látex corado com pigmento vermelho para identificarmos as artérias com maior precisão. Após a injeção, os animais foram colocados em solução aquosa de formaldeído 20% por período não inferior a 72 horas e, posteriormente, dissecamos as artérias responsáveis pela irrigação do baço. Observou-se em 30% dos casos, o baço posicionado caudalmente ao cólon transverso e, em 70%, cranialmente ao mesmo, mas sempre apoiado neste segmento intestinal. Com relação à irrigação do baço, observou-se que em 95% dos casos, o maior aporte sangüíneo era proveniente da artéria mesentérica cranial, onde apenas 30% dos animais apresentavam irrigação somente pela artéria lienal; já em 40% apresentavam irrigação pela artéria lienal e pequenos ramos da artéria cólica esquerda. Em 5% dos casos era irrigado pela artéria lienal e por um único ramo emitido por uma das artérias jejunais, 5% eram irrigados pela artéria lienal e por um ramo da artéria pancreaticaduodenal cranial e por uma artéria que tinha origem no tronco comum das artérias jejunais; 15% dos animais tinham seu baço irrigado pela artéria lienal e por ramos da artéria pancreaticaduodenal cranial. Em 5% dos animais observamos o baço sendo irrigado apenas por ramificações da artéria cólica esquerda.
Show more [+] Less [-]Morphology of the female reproductive tract of the brown howler monkey (Alouatta guariba clamitans) | Morfologia do aparelho reprodutor em fêmeas de bugio marrom (Alouatta guariba clamitans)
2007
Mariana Matera Veras | Maria Angélica Miglino | Zenon Silva
It was studied the external morphology, topography and the measures of the reproductive tract (ovaries, uterus, vagina and uterine tube) in six howler monkey females (Alouatta guariba clamitans). The ovaries are large and ellipsoid, with a smooth or irregular surface. The uterine tubes are long and convoluted, with well-developed and abundant fimbrias. The uterus is simple and characterized by a long and well-developed cervix and a globular fundic portion. The vagina is a long chamber with thin walls covered with a folded mucosa. The urethra opens in a distinct bilobate papilla within the ventral vagina wall. | Estudaram-se a morfologia externa, a topografia e a biometria do aparelho reprodutor (ovários, útero, vagina e as tubas uterinas) de seis fêmeas adultas de bugio marrom (Alouatta guariba clamitans). Notou-se que os ovários apresentaram-se grandes e elipsóides, com superfície lisa ou irregular. As tubas uterinas mostraram-se longas, convolutas e com fimbrias bem desenvolvidas e abundantes. O útero é simples e marcado por uma cérvix longa, bem desenvolvida e um fundo globoso. A vagina mostra-se como um canal alongado, de paredes finas e revestido por uma mucosa com pregas longitudinais; o orifício externo da uretra é marcado por uma papila uretral bilobada.
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