Publication: The autonomic innervation of the liver and gallbladder of Rana ridibunda
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Date
1989
Authors
Azanza, M.J. ; Aisa, J. ; Junquera, C. ; Castiella, T.
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Publisher
Murcia : F. Hernández
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DOI
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info:eu-repo/semantics/article
Description
Abstract
1 .- The innervation of the liver and gallbladder
of Rana ridibunda has been studied by the following
methods: (a) demonstration of cholinesterase activity;
(b) FIF method for catecholamines; (c) immunohistochemistry
for VIP and (d) electron microscopy.
2.- The hepatocytes are arranged in regular rows of
hepatic cords, very little connective tissue is distributed
in the parenchyma, the innervation being restricted to
the big branches of blood vessels.
3.- Well defined cholinergic and adrenergic plexuses
surround the hepatic arteries, portal veins and biliary
ducts. The VIPergic innervation is scarce in the liver
but a richly branched plexus spreads in the wall of the
gallbladder.
4.- Cholinesterase-positive cells are widely distributed
accompanying the nerve trunks of the gallbladder. The
innervation distribution is prominent in the portion of
the gallbladder next to the hepatic hilus.
5.- A population of melanin-storing cells besides free
melanine granules are present in the liver parenchyma
and are prominent in the gallbladder where the melanocytes
are disposed in close contact with blood vessels and
nerve structures. We have observed that the number of
these visceral melanocytes considerably increases in
winter, particularly in the liver.
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