Organization of the coelomic lining and a juxtaposed nerve plexus in the suckered tube beet of Parastichopus californicus (Echinodermata: Holothuroidea)
Date
2006
Authors
Journal Title
Journal ISSN
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Publisher
John Wiley & Sons, Inc.
Abstract
The coelomic lining of the water-vascular
canal in a suckered tube foot from the sea cucumber,
Parastichopus californicus, is a pseudostratified myoepithelium
consisting of flagellated adluminal cells and
myofilament-bearing retractor cells. The bodies of adluminal
cells flank the water-vascular canal and send basal
processes between the underlying retractor cells to confront
the podial connective tissue. Retractor cells have a
contractile apparatus of unregistered thick and thin myo-
filaments. The contractile apparatus is confined to the
medullary sarcoplasm and oriented parallel to the primary
axis of a tube foot. The bodies and processes of
retractor cells intermingle with the basal processes of
adluminal cells at the basal lamina of the coelomic lining.
A ganglionated nerve plexus in the podial connective tissue
approximates the basal lamina. Neuronal connectives
link the ganglia to one another and to the nerve plexus in
deep sectors of the podial epidermis. External laminae
enveloping the ganglia and connectives in the podial connective
tissue are continuous with the basal lamina of the
epidermis. The adventitial nerve plexus, since it merges
with the epidermal nerve plexus, is a component of the
ectoneural division of the echinoderm nervous system. J.
Morphol. 267:41–49, 2006. © 2005 Wiley-Liss, Inc.
Description
Keywords
Biology
Citation
Cavey, M. J. 2006 "Organization of the coelomic lining and a juxtaposed nerve plexus in the suckered tube beet of Parastichopus californicus (Echinodermata: Holothuroidea)" Journal of Morphology 267: 41–49