Resumo
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 this epithelium; they are located under the squamous cells, sheltered between capillaries and basal cells.
Pisces; Trichomicteridae; Trichogenes longipinnis; stomach; ultrastructure
Pisces; Trichomicteridae; Trichogenes longipinnis; stomach; ultrastructure
Estudo ultra-estrutural do estômago de Trichogenes longipinnis (Britski & Ortega) (Pisces, Siluriformes, Trichomicteridae)
Ultrastructural study of the stomach of Trichogenes longipinnis (Britski & Ortega) (Pisces, Siluriformes, Trichomicteridae)
Nadja Lima PinheiroI; Rosa Maria M. MendesII; Luiz Ludovico GeorgeIII; Antonio Carlos P. ChavesIV
IDepartamento de Biologia Animal, Universidade Federal Rural do Rio de Janeiro, Antiga Rodovia Rio São Paulo km 47, 23851-970 Itaguaí, Rio de Janeiro, Brasil
IIUniversidade Gama Filho, Rua Manoel Vitorino 625, 20748-900 Rio de Janeiro, Rio de Janeiro. Brasil
IIIDeapartamento de Histologia e Embriologia. Universidade de São Paulo, São Paulo, Brasil
IVFAHUPE, Rua Piraúba, 20940 Rio de Janeiro, Rio de Janeiro, Brasil
ABSTRACT
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 this epithelium; they are located under the squamous cells, sheltered between capillaries and basal cells.
Key words: Pisces, Trichomicteridae, Trichogenes longipinnis, stomach, ultrastructure
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Recebido em 25.XI.1993; aceito em 25.II.1994.
- BRITSKI, H.A. & H. ORTEGA. 1983. Trichogenes longipinnis, novo gênero e espécie de Trychomycterinae do sudeste do Brasil (Pisces, Siluriformes). Revta bras. Zool. 1 (3):211-216.
- GRASSÉ, P. 1965. Trate de Zoologie. Vol. 13 (2):1230-1282. Paris.
- HUEBNER, E. & G. CHEE. 1978. Histological and ultrastructural specialization of the digestive tract of the intestinal air breather Hoplosternum thoracatum (Teleost.). J. Morphol. 157:301-328.
- LAL, M.B. 1968. Studies on the anatomy and histology of the alimentary canal of a carp. Tor putitora (Ham). Proc. Natl. Acad. Sci. India., part B, Biol. Sci. 38:127-136.
- SEHGAL, P. & J. SALARIA. 1970. Functional anatomy and histology of the digestive organs oCirrhina mrigala. Proc. Natl. Acad. Sci. India 40:212-222.
- SEKAVEC, G.B. 1971. Gross morphology of the digestive tract of the lady fish, Elops saurus. Chesapeake Sci. 12 (4):275-276.
Datas de Publicação
-
Publicação nesta coleção
03 Ago 2009 -
Data do Fascículo
1993
Histórico
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Aceito
25 Fev 1994 -
Recebido
25 Nov 1993
