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Doctoral Thesis
DOI
https://doi.org/10.11606/T.10.2016.tde-24032015-150610
Document
Author
Full name
Luciana Pedrosa Iglesias
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2014
Supervisor
Committee
Assís Neto, Antônio Chaves de (President)
Favaron, Phelipe Oliveira
Miglino, Maria Angélica
Prado, Isaura Maria Mesquita
Silva, Frederico Ozanam Carneiro e
Title in Portuguese
Morfologia macro e microscópica do pâncreas de tamanduá-bandeira (Myrmecophaga tridactyla, Linnaeus 1758)
Keywords in Portuguese
Myrmecophaga tridactyla
Ácinos pancreáticos
Ilhotas pancreáticas
Tamanduá-bandeira
Abstract in Portuguese
O tamanduá-bandeira Myrmecophaga tridactyla é uma espécie considerada “vulnerável” no Brasil, por estar ameaçado de extinção em algumas regiões do país. O presente projeto teve por objetivo identificar e caracterizar as estruturas macro e microscópicas do pâncreas nessa espécie. Para tanto, foram dissecados 16 pâncreas de tamanduás-bandeira provenientes do Hospital Veterinário “Dr. Halim Atique” do Centro Universitário de Rio Preto (UNIRP). As amostras coletadas, foram provenientes de casos de animais atendidos no referido Hospital e que vieram a óbito. O pâncreas situava-se no antímero esquerdo do corpo do animal, apresentava coloração pálida, corpo central e superfície lobulada. Acompanhava a curvatura ventricular maior do estomago aderindo-se na porção inicial do duodeno. Relaciona-se crâniodorsalmente com o baço e ventrículo gástrico, e caudoventralmente com a cápsula fibrosa renal (que aloja o rim esquerdo) e intestinos. Estruturalmente, o órgão demonstrou duas partes distintas: a primeira delas com características exócrinas, composta por ácinos pancreáticos e a segunda endócrina, formada pelas ilhotas pancreáticas encontradas nas regiões media, caudoventral e lobar esquerda. A analise ultraestrutural permitiu identificar nas células centro-acinosas do pâncreas vesículas com grânulos de zimogênio, mitocôndrias, Aparelho de Golgi e retículo endoplasmático rugoso
Title in English
Macro and microscopic morphology of pancreas of the anteater (Myrmecophaga tridactyla Linnaeus, 1758)
Keywords in English
Myrmecophaga tridactyla
Pancreatic acini
Pancreatic islets
Xenartha
Abstract in English
The giant anteater Myrmecophaga tridactyla is a species considered 'vulnerable' in Brazil since it is threatened in some Brazilian regions. This study aimed to identify and characterize morphological structures of the pancreas in this species. For this, 16 anteaters pancreas from the Veterinary Hospital "Dr. Halim Atique at University Center of Rio Preto (UNIRP), were dissected. All samples were from animals treated at the hospital which died of natural causes. The pancreas was located in the left antimere of the animal’s body, being lobulated and having a pale color and central body. It followed the greater curvature of the stomach, adhering on the initial portion of the duodenum. It was craniodorsally related to the spleen and gizzard, and caudoventrally to the renal fibrous capsule (which houses the left kidney) and intestines. Structurally, the organ had two distinct parts: an exocrine, composed of pancreatic acini; and and endocrine, formed by pancreatic islets found in the medial, caudoventral and left lobar regions. The ultrastructural analysis allowed identifying the central-acinar pancreatic cells with vesicles zymogen granules, mitochondria, Golgi apparatus and rough endoplasmic reticulum
 
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Publishing Date
2016-09-28
 
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