Aspectos morfológicos da placenta da preguiça, Bradypus variegatus Shinz, 1825

Amorin, Marleyne José Afonso Accyoli Lins; Miglino, María Angélica; Júnior, Adelmar Afonso Amorin; Santos, Tatiana Carlesso dos

doi:10.1590/s1413-95962003000300009

Cited by 5 publications

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“…Compared to carnivores, herbivores consume a diet of lower nutritive value and digestibility, which directly affect intestine size, then promoting a longer intestine [9]. Thus, this country detached by presenting the greatest natural reserve of Bradypodidae animals, this data become important because of biologic models regarded to multidisciplinary research, which facilitate studies about anatomy, histology, physiology and pathology of these mammals [3]. The species Bradypus variegatus is typical of Neotropical region and present the greatest geographic distribution across sloths, occurring from Honduras to North Argentina, also commonly found in Brazilian Northeast [1,7,13] Before deficiency of literature about wild animals and necessity of knowledge about sloth B. variegatus, by merit of their great occurrence in Brazil and impact that they suffer, observing species sensibility and environment degradation caused by human actions, our study intend to perform a anatomic description of small and large intestine of the Xenarthras, delimiting their portions and describing the syntopy based on anatomic quadrant of abdominal region common to mammals.…”

Section: Introductionmentioning

confidence: 99%

Macroscopic Description of Small and Large Intestine of the Sloth Bradypus variegatus

Filho

Albuquerque

Alcântara

et al. 2018

Acta Scientiae. Vet.

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Background: Sloths of the species Bradypus variegatus are mammals with peculiar habits, which feed mostly young leaves of ‘embaúba’ and occur broadly in Central and South America. This specie has the greatest occurrence in Brazilian Northeast, making it a biological model for several researches in the fields as anatomy, physiology, genetics, pathology, histology and ecology, which provide data to literature in order to benefit maintenance and preservation of these animals. This study aimed to describe unpublished data about small and large intestine anatomy of the sloth Bradypus variegatus, in order to collaborate for knowledge of its digestive processes.Materials, Methods & Results: In order to perform this present research, 10 corpses of specie Bradypus variegatus belonged to the acquis of Anatomy Division, Department of Animal Morphology and Physiology (DMFA); Federal Rural University of Pernambuco (UFRPE), with 5 males and 5 females, the study was authorized by Animal Use and Experimentation Ethic Committee license (CEUA-UFRPE), nº 034/2015. All 10 animals used had natural death, were obtained through a donation of CETAS Tangará (Centro de Triagem de Animais Silvestres - Wildlife Screening Center), and located in the city of Recife. Animals were dissected at abdominal and pelvic portion, from a median sagittal incision, followed by lateral folding of skin, muscle and withdrawal of pubis portion for exposition and description of intestines, with analysis of syntopy and measurement of these organs. A relation was observed among external holes of urinary, reproductive and digestive systems. A relation was still observed among intestines and stomach, liver, kidneys, bladder and abdominal cavity wall. Some animals had absence of sigmoid colon, ventral and dorsal descendent colon. Regarding measurement, small intestine ranged from 147.09 to 163.59 cm for males and 117.44 to 151.28 cm for females, while large intestine varied between 39.68 and 43.35 cm for males, and 33.19 and 44.47 cm for females. Urinary and reproductive systems had a same external hole at perineal portion for both gender. Whereas digestive system ended at anus as occur commonly among mammals.Discussion: Among specimens described, most had the same anatomic profile regarding the intestinal portions and syntopy performed over other abdominal cavity organs. A difference was observed on liver size, increment of 20% for females and males sampled, excluding animals that had absence of structure that were minority, once 40% of females had no ventral descending colon, 20% of males and females had no sigmoid colon, and 20% of males had no dorsal descending colon. However, some animals that had absence demonstrated increase of other adjacent structures, for example, male that had no dorsal descending colon developed the largest sigmoid colon observed among animals measured for portions of duodenum, ventral descending colon, ascending colon and dorsal descending colon. Regarding the measurement of small and large intestine, Bradypus variegatus had differences compared to other herbivores, what suggests that this fact is associated to a restricted diet, in which that animal is submitted. Because of literature shortage about digestive system of specie Bradypus variegatus and other species of wild animals in general, it still difficult to infer or plot more accurate affirmations about this subject.

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Section: Introductionmentioning

confidence: 99%

Macroscopic Description of Small and Large Intestine of the Sloth Bradypus variegatus

Filho

Albuquerque

Alcântara

et al. 2018

Acta Scientiae. Vet.

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“…Studies of the morphology of brown‐throated sloth female reproductive system do not fully address the system, and no information about histology is available in the literature. It is known that the species has a pear‐shaped uterus with a single cavity (Wislocki, ) and that its placenta is classified as chorioamniotic, zonary discoidal and endotheliochorial (Amorim et al., ).…”

Section: Introductionmentioning

confidence: 99%

Reproductive System of Brown-throated Sloth (Bradypus variegatus, Schinz 1825, Pilosa, Xenarthra): Anatomy and Histology

Favoretto

daSilva

Menezes

et al. 2015

Anat. Histol. Embryol.

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In recent years, habitat degradation led to the decline of some populations of brown-throated sloth. The aim of this study was to describe morphological features of the female reproductive system of the species. The oval ovaries were partially surrounded by ovarian bursa. An external cortex and an inner medulla were present. Corpora lutea and corpora albicans together with follicles at various stages of development each with a single oocyte were found in the cortex. Uterine tubes were tortuous, tubular, travelled around the perimeter of the ovary and possessed a folded mucosa with ciliated pseudostratified epithelium. Uterus was simplex, with no horns and divided into three parts: a pear-shaped cranial segment and a long caudal uterine segment (both forming the body of the uterus) and two cervices. Uterus presented three layers: mucosa, lined by pseudostratified epithelium, muscular and serosa. The cervices connected the uterus to the urogenital sinus, a distensible cavity with longitudinal mucosal folds lined by transitional epithelium that extended from the external urethral orifice and the external uterine ostia to the vulva, which was lined by a keratinized stratified squamous epithelium. Brown-throated sloth presented a bipartite clitoris with paired crura, bodies and glandes. The presence of a double cervix and a bipartite clitoris was unique features of the species.

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“…A biologia reprodutiva das xenarthras ainda apresenta muitas incógnitas, principalmente no que se refere ao comportamento reprodutivo e à fisiologia endócrina, do ciclo estral (Snoeck 2010) à gestação (Amorim 2003, Miranda & Costa 2007. Preguiças machos e fêmeas são difíceis de serem distinguidos, exceto pela marca dorsal em Bradypus (Britton 1941).…”

Section: Introductionunclassified

Análise morfológica e morfométrica das gônadas de preguiça (Bradypus variegatus Schinz, 1825)

2013

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A preguiça pode ser designada, zoologicamente, como um mamífero da classe Eutheria, ordem Edentata, subordem Xenarthra e família Bradypodidae. O gênero Bradypus é constituído de três espécies distintas: a preguiça-de-bentinho (B. tridactylus), restrita à região amazônica; a preguiça-comum (B. variegatus), de ampla distribuição, ocorrendo nas Américas Central e do Sul e a preguiça-de-coleira (B. torquatus), única seriamente ameaçada de extinção. Percebe-se a necessidade de uma investigação mais aprofundada sobre a espécie B. variegatus, a fim de contribuir de forma efetiva com a elaboração de tratados de anatomia da fauna silvestre, além de buscar mais informações sobre a anatomia do sistema reprodutor do bicho preguiça (Bradypus variegatus Schinz, 1825) e, desta forma, aplicar os novos conhecimentos na sua preservação. Utilizamos quatro indivíduos machos e três fêmeas, pertencentes ao banco de espécies da Área de Anatomia do Departamento de Morfologia e Fisiologia Animal da Universidade Federal Rural de Pernambuco (DMFA/UFRPE), as quais foram dissecados e evidenciamos a vascularização das gônadas, bem como suas localizações e aspectos morfológicos e morfométricos dos testículos e ovários. Como resultados, observou-se que o macho possui testículos localizados no interior do espaço intraabdominal, ligados às glândulas adrenais por um ligamento de peritônio. A vascularização não é feita por um plexo pampiniforme, mas por uma artéria e uma veia testicular. Os testículos possuem, em média, volume igual a 1,42cm³ e espessura, largura e comprimento, respectivamente iguais a 0,98, 1,23 e 1,45cm. Os ovários também estão no interior do espaço intra-abdominal, no fundo do útero, protegidos por uma bolsa ovariana, composta por mesovário e mesossalpinge. A vascularização é realizada por um plexo arteriovenoso que irriga e drena o útero, e suas ramificações na parede uterina atingem os ovários. Os ovários possuem, em média, espessura, largura e comprimento, respectivamente iguais a 0,37, 0,73 e 0,62 cm.

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Aspectos morfológicos da placenta da preguiça, Bradypus variegatus Shinz, 1825

Cited by 5 publications

References 0 publications

Macroscopic Description of Small and Large Intestine of the Sloth Bradypus variegatus

Macroscopic Description of Small and Large Intestine of the Sloth Bradypus variegatus

Reproductive System of Brown-throated Sloth (Bradypus variegatus, Schinz 1825, Pilosa, Xenarthra): Anatomy and Histology

Análise morfológica e morfométrica das gônadas de preguiça (Bradypus variegatus Schinz, 1825)

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