Atenção: Todas as denúncias são sigilosas e sua identidade será preservada.
Os campos nome e e-mail são de preenchimento opcional
Metadados | Descrição | Idioma |
---|---|---|
Autor(es): dc.contributor | Universidade Estadual Paulista (Unesp) | - |
Autor(es): dc.creator | [Anonymous] | - |
Data de aceite: dc.date.accessioned | 2022-02-22T00:03:29Z | - |
Data de disponibilização: dc.date.available | 2022-02-22T00:03:29Z | - |
Data de envio: dc.date.issued | 2020-12-09 | - |
Data de envio: dc.date.issued | 2020-12-09 | - |
Data de envio: dc.date.issued | 2005-06-01 | - |
Fonte completa do material: dc.identifier | http://hdl.handle.net/11449/194639 | - |
Fonte: dc.identifier.uri | http://educapes.capes.gov.br/handle/11449/194639 | - |
Descrição: dc.description | The testes in the anurans are paired ovoid organs constituted by seminiferous structures surrounded by the fibrous connective tissue, commonly unprovided ofpigments. This study tried to analyze the morphological characteristics of rare and conspicuous pigment-containing cells and their relationship with other structures. The pigment cells are variously and indistinctly also termed Kuppfer cells in the liver, pigment cells, extracutaneous pigment cells, pigmented macrophages, melanomacrophages, melanophage, melanophores and melanocytes in the liver, spleen and kidney and other visceral structures of exothermic vertebrates. Ten male samples of Physalaemus nattereri (Steindachner, 1863) (Leptodactylidae) were used. After macroscopic analyses, the testicular fragments weresubmitted to the histological routine, fixed with karnovisky, embedded Historesin and coloration with Haematoxylin/Eosin. A rare peculiarity was the presence of numerous pigment-containing cells (melanocytes) randomly distributed in the albuginea tunic and testicular interstitium, giving the testes a dark brown coloration. This unusual characteristic has been rarely described and in other lower vertebrates, the pigment cells can be found in different organs, constituting an extracutaneous pigmentary system of unknown function. Further, it was identified a conspicuous variation, as to presence and distribution pattern due to possible species-specific aspects. However, histologically there is no difference in the germ epithelium arrangement. Between the seminiferous locules, there is an inter-locular tissue composed by Leydig interstitial cells, fibroblasts, efferent ductules, melanocytes and blood vessels. This inter-locular tissue is relatively scarce, presenting melanocytes in all specimens analyzed intimate associated with blood vessels. They are irregular cells with numerous melanosomes and long cytoplasmic processes. | - |
Formato: dc.format | 454-460 | - |
Idioma: dc.language | pt_BR | - |
Publicador: dc.publisher | Sociedade Brasileira De Zoologia, Univ Federal Parana | - |
Relação: dc.relation | Revista Brasileira De Zoologia | - |
???dc.source???: dc.source | Web of Science | - |
Título: dc.title | Testicular pigmentation in Physalaemus nattereri (Steindachner) (Amphibia, Anura) with anatomical observations on the extracutaneous pigmentary system | - |
Tipo de arquivo: dc.type | livro digital | - |
Aparece nas coleções: | Repositório Institucional - Unesp |
O Portal eduCAPES é oferecido ao usuário, condicionado à aceitação dos termos, condições e avisos contidos aqui e sem modificações. A CAPES poderá modificar o conteúdo ou formato deste site ou acabar com a sua operação ou suas ferramentas a seu critério único e sem aviso prévio. Ao acessar este portal, você, usuário pessoa física ou jurídica, se declara compreender e aceitar as condições aqui estabelecidas, da seguinte forma: