Data/hora: 01/06/2024 03:44:19

Provedor de dados: | 57
País: | Brazil
Título: | Epithelial gill cells in the armored catfish, Hypostomus cf. plecostomus (Loricariidae)
Autores: | FERNANDES,M. N.; PERNA-MARTINS,S. A.
Data: | 2001-02-01
Ano: | 2001
Palavras-chave: | Gills; Epithelium; Teleost; Loricariid; Hypostomus cf. plecostomus.
Resumo: | Epithelial gill cell morphology and distribution were investigated in the armored catfish, Hypostomus cf. plecostomus, which lives in soft ion-poor Brazilian freshwaters. Pavement cells are the most abundant type of cell on both filament and lamellar epithelia and there are a great number of mucous and chloride cells between them. Mucous cells are almost covered by adjacent pavement cells and have large packed granules showing electrondense differences. No mucous cells were found on the lamellar epithelium. Chloride cell were distributed throughout both epithelia and usually have large apical surface facing the external medium and may exhibit short and sparsely distributed microvilli. The presence of chloride cells on the lamellar epithelium may be an adaptation to low ion concentrations in the water, allowing for improved ion-transport capacity of the gill. The large size of these cells increases the water-blood barrier and may affect the transference of respiratory gases. However, the negative effect on the respiratory process may be minimized by this species' ability to resort to atmospheric air to fulfill its oxygen requirements.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082001000100010
Editor: | Instituto Internacional de Ecologia
Relação: | 10.1590/S0034-71082001000100010
Formato: | text/html
Fonte: | Revista Brasileira de Biologia  v.61 n.1 2001
Fonte: | info:eu-repo/semantics/openAccess