Publication: Ultrastructure of the tubular nephron of Testudo graeca (Chelonia). A comparison between hibernating and non-hibernating animals
Loading...
Date
1987
Authors
Zuasti, A. ; Ferrer, C. ; Ballesta Germán, José ; Pastor García, Luis Miguel
item.page.secondaryauthor
item.page.director
Publisher
Murcia : F. Hernández
publication.page.editor
publication.page.department
DOI
item.page.type
info:eu-repo/semantics/article
Description
Abstract
The tubular nephron of hibernating and nonhibernating
specimens of Testudo graeca (Chelonia) was
studied by means of conventional light and electron
microscopy and histochemistry. The tubular nephron
was composed of proximal, intermediate, distal and
collecting tubules in both hibernating and nonhibernating
animals. The cells of the proximal tubule
showed long microvilli, cytoplasmic vacuoles, a
developed endoplasmic reticulum and abundant
mitochondria. Fat droplets were also observed. The
intermediate segment was lined by ciliated and nonciliated
cells. The lining cells of the distal tubule
presented few microvilli, abundant dense mitochondria
and clear vesicles of mucous appearance in the terminal
portion. Collecting ducts are composed of mucous and
non-mucous cells. Mucous cells presented strong
reaction to the histochemical techniques detecting sialoand
sulpho-mucins.
During hibernation, a progressive vacuolar degeneration
of the endoplasmic reticulum was observed in al1 the
segments of tubular nephron, which may be caused by a
massive intake of extracellular water into the cell.
publication.page.subject
Citation
item.page.embargo
Ir a Estadísticas
Sin licencia Creative Commons.