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Abstract:

The ultrastructure of the intermediate segment (IS), distal tubule and collecting tubule (CT) of the south american toad Bufo arenarum, was studied by light and transmission electron microscopy. The IS is composed of cubical ciliated cells which propel the urine along the renal tubule. The distal tubule is divided into two portions: the early distal tubule (EDT) and the late distal tubule (LDT). The EDT is characterized by only one type of cells with well developed basolateral interdigitations and numerous elongated mitochondria, which are oriented normal to the basal surface. The "macula densa - like" is a specialized zone of the EDT in contact with the vascular pole, where cells are more tightly packed than in the rest of the tubule. The LDT shows two types of cells called dark and light cells according to the appearance of their cytoplasm. Dark cells have microplicae and few but long microvilli at their luminal surface, and abundant mitochondria in their cytoplasm. Light cells show basal and lateral infoldings and few mitochondria. The CT, which is composed of dark and light cells, exhibits an enlarged lumen with an undulated surface and dilated spaces between neighbouring cells. This work is a contribution to the knowledge of the kidney of B. arenarum; frequently used as an experimental model for physiological and biochemical studies.

Registro:

Documento: Artículo
Título:Structure of the kidney of Bufo arenarum: Intermediate segment, distal tubule and collecting tubule
Autor:Farías, A.; Hermida, G.N.; Fiorito, L.E.
Filiación:Laboratorio de Histologia Animal, Depto. de Biodiv./Biol. Experimental, Universidad de Buenos Aires, Buenos Aires, Argentina
Laboratorio de Histologia Animal, Depto. de Biodiv./Biol. Experimental, Universidad de Buenos Aires, Av. Güiraldes s/n, (C1428EHA) Buenos Aires, Argentina
Palabras clave:Amphibia; Kidney; Renal tubules; Ultrastructure; article; basolateral membrane; ciliated epithelium; cytoplasm; functional anatomy; kidney collecting tubule; kidney distal tubule; kidney intermediate segment; kidney structure; nonhuman; toad; transmission electron microscopy; ultrastructure; Animals; Bufo arenarum; Female; Kidney; Kidney Tubules; Kidney Tubules, Collecting; Kidney Tubules, Distal; Male; Amphibia; Anura; Bufo americanus; Bufo arenarum
Año:2003
Volumen:27
Número:1
Página de inicio:19
Página de fin:28
Título revista:Biocell
Título revista abreviado:Biocell
ISSN:03279545
CODEN:BOCEE
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03279545_v27_n1_p19_Farias

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Citas:

---------- APA ----------
Farías, A., Hermida, G.N. & Fiorito, L.E. (2003) . Structure of the kidney of Bufo arenarum: Intermediate segment, distal tubule and collecting tubule. Biocell, 27(1), 19-28.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03279545_v27_n1_p19_Farias [ ]
---------- CHICAGO ----------
Farías, A., Hermida, G.N., Fiorito, L.E. "Structure of the kidney of Bufo arenarum: Intermediate segment, distal tubule and collecting tubule" . Biocell 27, no. 1 (2003) : 19-28.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03279545_v27_n1_p19_Farias [ ]
---------- MLA ----------
Farías, A., Hermida, G.N., Fiorito, L.E. "Structure of the kidney of Bufo arenarum: Intermediate segment, distal tubule and collecting tubule" . Biocell, vol. 27, no. 1, 2003, pp. 19-28.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03279545_v27_n1_p19_Farias [ ]
---------- VANCOUVER ----------
Farías, A., Hermida, G.N., Fiorito, L.E. Structure of the kidney of Bufo arenarum: Intermediate segment, distal tubule and collecting tubule. Biocell. 2003;27(1):19-28.
Available from: https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03279545_v27_n1_p19_Farias [ ]