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Estudo ultra-estrutural do esôfago de Trichogenes longipinnis (Britski & Ortega) (Pisces, Siluriformes, Trichomicteridae) Zoologia
Pinheiro,Nadja Lima; Mendes,Rosa Maria M.; George,Luiz Ludovico; Sales,Armando.
Trichogenes longipinnis (Britski & Ortega, 1983) is a leather fish restricted to the rivers on the shore in the southeast of Brazil. In this work, the oesophagous structure is being showed. The oesophagous appears itself short, dorsally inclinated toward pericardium and ventrally covered by liver lobe. By electron microscopy we can observe a mucosa layer formed by stratified squamous epithelium and lamina propria with stratum compactum. The epithelium is composed by three types of cells: superficial squamous cells; mucous cells, similar to the globet cells and polyhedric cells. The stratification of this epithelium provides a complete basal layer of proliferation polyhedric cells. The cells in the intermediate region of the epithelium are also...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Pisces; Trichomicteridae; Trichogenes longipinnis; Oesophagous; Ultrastructure.
Ano: 1993 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751993000400008
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Estudo ultra-estrutural do estômago de Trichogenes longipinnis (Britski & Ortega) (Pisces, Siluriformes, Trichomicteridae) Zoologia
Pinheiro,Nadja Lima; Mendes,Rosa Maria M.; George,Luiz Ludovico; Chaves,Antonio Carlos P..
The observations made about the stomach of Trichogenes longipinnis (Britski & Ortega, 1983) showed a rounded organ which has in its dorsal side an accessory structure - a cul de sac - that comunicates with it. The distal part of this dorsal accessory presents characteristic of an organ that exercise respiratory functions: reduction in the thickness of the mucosa and arrangement of an intrincate continuous capilar net in close contact with the superficial cells of the epithelium. In this portion there are no glands in the lamina propria. The epithelium shows a superficial squamous cels; they are very slim, and sometimes, with the capillary endothelium form a single barrier between the organ lumen and the blood. Polyhedric cells are also present in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Pisces; Trichomicteridae; Trichogenes longipinnis; Stomach; Ultrastructure.
Ano: 1993 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751993000400009
Registros recuperados: 2
Primeira ... 1 ... Última
 

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