Publication: Ultrastructural features of the gut in the white sturgeon, Acipenser transmontanus
Loading...
Date
2000
Authors
Radaelli, G. ; Domeneghini, C. ; Arrighi, S. ; Francolini, M. ; Mascarello, F.
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
Electron-microscopic examinations of the
sturgeon gut were performed. Oesophageal goblet cells
were abundant in the stratified epithelium. The
ultrastructural features of the secretory granules of the
oesophageal and intestinal goblet cells were quite similar
to those of other vertebrates. Lobules of multilocular
adipose tissue were observed in the deep tunica propriasubmucosa
of the oesophagus, in close association with
vasculature and large fibre bundles of myelinated and
unmyelinated axons. Similarly composed nerve fibre
bundles were observed in the cardiac stomach. too. The
presence of myelinated axons is an unusual feature in the
vertebrate enteric nervous system. Cardiac and fundic
zones of the stomach showed an epithelium with
columnar ciliated and non-ciliated cells, the latter
equipped with fuzzy microvilli. Cells lining the tubular
gastric proper glands were markedly granulated.
Intestinal superficial epithelium was columnar and
contained ciliated, as well as non-ciliated and goblet
cells. In the tunica propria all over the intestine, the
presence and ultrastructure of granulated cells was in
addition described. Intraepithelial granulated leukocytes
were seen throughout the alimentary canal. Various types
of endocrine cells were seen both in the stomach and in
the intestine, the size of their granules was measured and
their ultrastructure described and compared to that of
mammalian cell types.
Citation
item.page.embargo
Ir a Estadísticas
Sin licencia Creative Commons.