Aspectos morfológicos macro e microscópicos do estômago de tamanduá-mirim (Tamandua tetradactyla)

Pinheiro, Abud; Lima, Ana Rita de; Carvalho, Ana Flávia de; Pereira, Luiza Corrêa; Branco, Érika

doi:10.1590/1678-7140

Cited by 10 publications

(13 citation statements)

References 5 publications

(1 reference statement)

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“…From the internal perspective, the organ has only one cavity, with gastric folds diffusely distributed throughout the cardia, fundus and pyloric regions, as observed in other mammals [8,9,13]. Similar to that described for Kerodon rupestris stomach [2] and the stomach of Tamandua tetradactyla [20]. In the regions of the body and fundus of the stomach, a higher amount of more strongly pronounced mucosal folds was observed, as also reported in a study of the stomach of the black-tufted marmoset (Callithrix penicillata) [23].…”

Section: Discussionmentioning

confidence: 63%

“…This citation is justified due to the presence of macroscopic and microscopic structures inherent in the composition of the organs of the digestive tract, which are determined according to the nature of the food and how it will be subsequently ingested and processed [6]. Therefore, the digestive morphology has variable character, characteristics may vary even in animals belonging to the same class as evidenced [5], in which the stomachs of White-lipped peccary (Tayassu pecari) and Collared peccary (Tayassu tajacu), are divided into four chambers, while the tayra (Eira barbara), nine-banded armadillo (Dasypus novemcinctus) and the crab-eating fox (Cerdocyon thous) have only one chamber [20,28].…”

Section: Discussionmentioning

confidence: 99%

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Morphology of the Stomach of Tayra (Eira barbara)

Lima

Gonçalves

Branco

et al. 2018

Acta Scientiae. Vet.

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Background: The Tayra (Eira barbara) is a mammal of the family Mustelidae with a significant presence in Latin America, it is considered an opportunist and extremely agile omnivorous. Some organs compose the digestive system and the stomach is a substantial organ for this system. The stomach have a small and a large curvature and the regions of the cardia, fundus, body and pylorus. Histologically, the stomach is made up of four layers or tunics that contributes in digestive functions. However, due the limited information available in the literature about morphophysiology of wildlife, this study aimed to clarify the morphology of Eira barbara stomach to understand your digestive system.Materials, Methods & Results: Three males and three females of Eira barbara species were studied (all young adults), all samples were originated of the Bauxite Mine area, in Paragominas, Pará state, Brazil provided of donation to Morphological Animal Research Laboratory (LaPMa) of the Universidade Federal Rural da Amazonia (UFRA), after death by trampling. The corpses were treated with aqueous 10% formaldehyde solution intramuscular injections, subcutaneous and intracavitary. After dissection, the collected material was processed following histologic standard protocols for the subsequent preparation of slides. The studied animals showed the stomach on the left antimere the abdominal cavity, with saccular format with the presence of large and small curvatures. The organ showed composite mucosa made with various gastric folds distributed in regions of the cardia, fundus and pylorus. A microscopic analysis of Eira barbara stomach revealed the presence of tunics or layers which gradually invaginate the lumen of the organ and underlying lamina propria was located to the prismatic epithelium and muscular mucosae and mucosa itself. In the region of the cardia, the muscle layer was deeply situated on the lamina propria, consisting of smooth muscle tissue with circular and longitudinal fibers. The submucosa consists of loose connective tissue; it is much thicker than the lamina propria and has many vessels. The first portion of the stomach showed long glands, while with short pits. In light microscopy, the fundic region revealed the presence of a highly pleated epithelium with elongated glands composed of clear and basally placed cells, with flattened nuclei. These cells are named mucous. Along the short region of the gastric pits, the presence of large cells was reported, pyramidal or rounded, central nucleus, called parietal. The pyloric region microscopy revealed the presence of short glands, similar to those previously described in the cardia region. The wide presence of goblet cells in the final portion of the pylorus indicated gradual transition between the regions of the stomach to the intestine, called duodenum-pylorus transition. The muscular layer showed thick muscle bundles just in circular direction, being responsible for the formation of the pyloric sphincter.Discussion: The morphological analysis of the stomachs showed morphological and topographical similarities to the literature description for pets and wild mammals, however, were found in abundant quantities goblet cells in the transition duodenal pylorus. The goblet cells are located throughout the length of the small and large intestine and are responsible for the production and maintenance of the protective mucus synthesizing as glycoproteins known as mucins.

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Section: Discussionmentioning

confidence: 63%

Section: Discussionmentioning

confidence: 99%

Morphology of the Stomach of Tayra (Eira barbara)

Lima

Gonçalves

Branco

et al. 2018

Acta Scientiae. Vet.

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“…Estudos morfológicos do aparelho digestório de espécies selvagens ainda são escassos na literatura, portanto são necessárias pesquisas avançadas sobre as características morfológicas, com o intuito de fornecer contribuições aos estudos posteriores e conhecer os processos digestivos e a alimentação adequada para cada espécie (Pinheiro et al, 2014).…”

Section: Discussionunclassified

“…Muitas dessas distinções são adaptativas e refletem a alimentação habitual dos vários grupos de animais; a dieta concentrada de carnívoros, por exemplo, é digerida com mais facilidade e esses animais possuem um estômago pequeno e simples. Em L. pardalis, o estômago mostrou-se como um órgão unicavitário e altamente dilatável quando cheio de alimento, assim como em Cerdocyon thous (Heleno et al, 2011), Tamandua tetradactyla (Pinheiro et al, 2014), Cuniculus paca (Machado et al, 2015), Hydrochaeris hydrochaeris (Moraes et al, 2002) e mamíferos domésticos, como cães e gatos (Getty, 1986). Em relação à mucosa interna do estômago, os exemplares do presente estudo diferiram de C. thous (Heleno et al, 2011), que apresentou uma mucosa com pregas restritas à região pilórica.…”

Section: Discussionunclassified

“…As pregas gástricas contribuem para distensão do órgão quando este está repleto de alimento (Nisa et al, 2010), e, através dos movimentos mecânicos realizados pelo órgão, essas pregas possivelmente auxiliem a misturar o alimento às secreções estomacais. Em seus aspectos histológicos, as regiões cárdica, fúndica e pilórica do estômago dos exemplares estavam organizadas nas camadas características do tubo digestório de mamíferos domésticos e silvestres: mucosa, submucosa, muscular e serosa (Samuelson 2007;Heleno et al, 2011;Santos, 2012;Silva, 2012;Machado, 2015;Pinheiro et al, 2014).…”

Section: Discussionunclassified

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Características morfológicas do estômago de jaguatirica (Leopardus pardalis - Linnaeus, 1758)

Schuingues

Lima

Santos-Filho

et al. 2019

Arq. Bras. Med. Vet. Zootec.

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RESUMO Leopardus pardalis é uma das espécies de felinos neotropicais mais estudadas em seus aspectos ecológicos, porém informações de questões morfofisiológicas do trato digestório não são encontradas na literatura. Visando contribuir com tais informações, o objetivo deste artigo foi caracterizar a morfologia do estômago dessa espécie. Nesta pesquisa, foram utilizados cinco exemplares adultos, coletados após óbito por atropelamento ou doados pelo IBAMA ao Laboratório de Zoologia e Morfologia Animal da Universidade do Estado de Mato Grosso - Alta Floresta. Os animais foram fixados com solução aquosa de formaldeído a 10%, dissecados por meio de técnicas anatômicas. Além dos estudos anatômicos, também foram coletados tecidos para microscopia. As análises macroscópicas revelaram que o estômago era do tipo unicavitário, com presença de pequena e grande curvatura, localizado no antímero esquerdo e constituído pelas regiões características do órgão. Em seus aspectos microscópicos, mostrou-se formado pelas quatro túnicas usuais do tubo digestório: túnica mucosa, submucosa, muscular e serosa, cada uma com as particularidades características de cada região, principalmente na túnica mucosa. O estômago de L. pardalis revelou uma morfologia semelhante às espécies domésticas e selvagens, com particularidades histomorfológicas na região pilórica. Esse padrão pode estar relacionado a adaptações evolutivas no processo digestivo dessa espécie.

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Sloths (Bradypus variegatus) as a polygastric mammal

Mesquita

Soares

Mello

et al. 2020

Microscopy Res & Technique

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Fermentative herbivorous animals have peculiar conformations of the digestive system. It is known that B. variegatus obtained the capacity for evolutionary adaptation, due to their ecology and eating habits. However, despite the literature on feeding management for this species, there is a lack of published information regarding its gastric morphology, and such information would support a better understanding on the diet and digestion of these individuals. We found seven gastric compartments, which histologically revealed three distinct patterns: an aglandular keratinized fraction (mechanical stomach) and two glandular fractions, one a mucus secretor and the other one composed of acid secreting cells (chemical stomach). With these evidences we understand that these individuals have gastric resemblance to ruminants, with some inherent peculiarities of this species, including the transit of the bolus.

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Aspectos morfológicos macro e microscópicos do estômago de tamanduá-mirim (Tamandua tetradactyla)

Cited by 10 publications

References 5 publications

Morphology of the Stomach of Tayra (Eira barbara)

Morphology of the Stomach of Tayra (Eira barbara)

Características morfológicas do estômago de jaguatirica (Leopardus pardalis - Linnaeus, 1758)

Sloths (Bradypus variegatus) as a polygastric mammal

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