Ramos do arco aórtico e da aorta torácica em bicho-preguiça (Bradypus variegatus)

Albuquerque, Priscilla Virgínio de; Sena, Diana Guiomar Ferreira De; Braz, Richelle da Silva; Mesquita, Emanuela Polimeni de; Lacerda, M. A. S.; Silva, W.J.; Sá, Fabrício Bezerra de; Amorim, Marleyne José Afonso Accioly Lins

doi:10.1590/1678-4162-9963

Cited by 7 publications

(9 citation statements)

References 9 publications

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“…Similar anatomical variations have been reported in the Sloth ( Bradypus variegatus ) (Albuquerque et al., 2018). In that study, three branching patterns have been described, the most common being the presence of three branches arising from the aorta, namely the right brachiocephalic trunk, left common carotid and left subclavian arteries.…”

Section: Discussionsupporting

confidence: 84%

“…Aortic arch branches have been described in Dasypus novemcinctus (armadillo) (Domeniconi, Abreu, Benetti, & Villaça, 2004), Tamandua tetradactyla (southern tamandua) (Pinheiro, Lima, Pereira, Gomes, & Branco, 2012) and Bradypus variegatus (Albuquerque et al., 2018). The anatomical location of the heart and the structure of the pericardium of the giant anteater were similar to other mammals in the Xenarthra Superorder.…”

Section: Discussionmentioning

confidence: 99%

“…Data obtained from the cardiac structure of Tamandua tetradactyla byPinheiro et al (2014). Comparison of the branches emerging of the aortic arch between four species of Xenarthra a Tamandua tetradactyla byPinheiro et al (2012), of Dasypus novemcinctus byDomeniconi et al (2004) and of Bradypus variegatus byAlbuquerque et al (2018).…”

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confidence: 99%

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Heart structure and coronary blood supply of the Giant anteater (Myrmecophaga tridactyla)

Santos

Benetti

Oliveira

et al. 2020

Anat Histol Embryol

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The structure of the heart and the coronary blood supply of wild mammals, including that of threatened species, are poorly understood. This study set out to describe the heart, aortic arch branching and coronary distribution of Myrmecophaga tridactyla, and to compare it with anatomical descriptions of other Xenarthra given elsewhere. Eight adult giant anteater cadaveric specimens were used in this study. Morphological features of the heart and coronary blood supply were examined using gross dissection as well as latex and cast preparations. The heart lied in the median plane of the thoracic cavity and corresponded to a cone‐shape structure with a rounded apex facing left. The internal chambers of the heart comprised the same structures described in other mammals. Two different patterns of coronary blood supply were observed in the giant anteater. Hence, it can be concluded that the three species of Xenarthra share the same heart structure described in other mammals to date. Aortic arch branches and variations in coronary blood supply in this study have been described in carnivores, particularly the cat and the galea. The branching pattern of the coronary artery differed from that of other mammals and may be specific to Myrmecophaga tridactyla. Morphological description of the heart of the giant anteater and comparison with morphological features of other mammals, especially Xenarthra, may assist in phylogenetic analysis and provide significant contributions to clinical anatomy of practical procedures.

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Section: Discussionsupporting

confidence: 84%

Section: Discussionmentioning

confidence: 99%

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Heart structure and coronary blood supply of the Giant anteater (Myrmecophaga tridactyla)

Santos

Benetti

Oliveira

et al. 2020

Anat Histol Embryol

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“…This conformation is different from that analyzed in the bradipodids used in this study, in which the aortic arch originates the right brachiocephalic trunk, the left common carotid artery, the left subclavian artery and continues with the descending aorta. Although all dissected specimens demonstrated such an arterial arrangement, variations were described by Albuquerque et al (2018). The authors reported specimens in which the right brachiocephalic trunk and the left common carotid artery and the left subclavian artery originated from the arch, resembling that seen in the raccoon (Pereira et al, 2016).…”

Section: Discussionmentioning

confidence: 98%

External macroscopic anatomy of the Bradypus variegatus heart

Albuquerque

Mesquita

Alcântara

et al. 2022

Arq. Bras. Med. Vet. Zootec.

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The sloth is known for its slow movements and arboreal habits. Most parts of its anatomy need yet to be unveiled, in order to understand the peculiarities that justify its behavior. In this sense, an investigation of the external characteristics of the heart of the three-toed sloth, Bradypus variegatus, was carried out to indicate the shape, the faces, the dimensions, the topography, and the coating of this organ. For this purpose, fifteen corpses destined for dissection and four healthy specimens were used to carry out thorax digital x-ray. Based on the obtained results, it was noticed that the heart of the species in question presents conical shape, situated obliquely in the mediastinum, is displaced to the left and has latero-lateral slight flattening. Among the animals, discrepancies were found in the organ skeletopy, which presents the tapered apex and the base, in which the large vessels can be observed, whose arrangements also proved to be variables. The heart presents faces (right and left), margins (cranial and caudal) and is surrounded by the pericardium, which gives off two ligaments, sternopericardial and phrenico pericardial. Its size is proportional to the age and length of the individual, with measurements, in general, slightly larger in males.

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“…, Mongolian gerbil (Meriones unguiculatus)(Oliveira et al, 2018), brown-throated sloth (Bradypus variegatus)(Albuquerque et al, 2018), black-tufted marmoset (Callithrix penicillata)(Souza Neto et al, 2019) and manatee (Trichechus manatus)(Oliveira, Santoro, et al, 2020), namely the brachiocephalic trunk, the left common carotid artery and the left subclavian artery, in a type 3 arrangement. This model was not observed in the collared peccaries analysed herein.…”

mentioning

confidence: 99%

Collateral aortic branches in the collared peccary (Pecari tajacu Linnaeus, 1758)

Gurgel

Sousa

Oliveira

et al. 2022

Anat Histol Embryol

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The determination of arterial vascular distribution patterns can contribute to more detailed knowledge on arterial systems. In this context, the aim of the present study was to describe the collateral aortic branches in the collared peccary, aiming to define a standard model for this species, providing information through comparative anatomy for analysis of some evolutionary aspects of the order Artiodactyla. Ten young male animals were employed. The vascular system was washed with a saline solution and then perfused with Neoprene 450 latex coloured with red or yellow pigment, followed by collateral aorta branch dissections and analyses. The contrasted digital radiography technique was applied to two animals, which were initially perfused with a barium sulphate solution (1 g/ml) and Neoprene 450 latex at a 1:3 ratio, and subsequently, the digital radiographic examination was performed. The aortic arch of the collared peccary emitted the brachiocephalic trunk and the left subclavian artery, while eight symmetric pairs of dorsal intercostal arteries originated from the thoracic aorta. The abdominal aorta, in turn, exhibited the celiac, cranial mesenteric, renal, caudal mesenteric, testicular, external iliac, internal iliac and sacral arteries as the collateral branches in all studied animals. Therefore, no relevant variations were observed regarding the arrangement of the arterial distribution of the aorta, thus suggesting a static standard model in the collared peccary.

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Ramos do arco aórtico e da aorta torácica em bicho-preguiça (Bradypus variegatus)

Cited by 7 publications

References 9 publications

Heart structure and coronary blood supply of the Giant anteater (Myrmecophaga tridactyla)

Heart structure and coronary blood supply of the Giant anteater (Myrmecophaga tridactyla)

External macroscopic anatomy of the Bradypus variegatus heart

Collateral aortic branches in the collared peccary (Pecari tajacu Linnaeus, 1758)

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