Premium
Electron microscopy of the esophageal ganglion complex of the gastropod pulmonate Triodopsis divesta . I. Ultrastructure of the epineurium
Author(s) -
Dyer Robert F.,
Cowden Ronald R.
Publication year - 1973
Publication title -
journal of morphology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.652
H-Index - 74
eISSN - 1097-4687
pISSN - 0362-2525
DOI - 10.1002/jmor.1051390202
Subject(s) - epineurium , ultrastructure , anatomy , biology , connective tissue , ganglion , cell type , myoepithelial cell , perineurium , microbiology and biotechnology , endoneurium , electron microscope , cell , pathology , immunohistochemistry , medicine , sciatic nerve , genetics , physics , peripheral nerve , optics , immunology
The epineurium of the esophageal complex of the gastropod pulmonate Triodopsis divesta was examined by electron microscopy. The epineurium consists of two main regions: an inner dense fibrous region adjacent to the avascular neural tissue of the ganglion and an outer cellular region comprised of a variety of cell types embedded in a connective tissue matrix. The dense fibrous region contains smooth muscle cells and associated nerve processes and is invested on the neural side by thin processes of glial cells. The outer highly cellular region contains smooth muscle cells, nerve processes, wandering cells (amebocytes), globular cells, and myoepithelial cells comprising the walls of the vascular system. In addition, a cell type not previously identified in other gastropod epineuria is present. These cells resemble neurosecretory cells. The morphology and structural interrelationships of these various constituents are presented and the possible functions of individual cell types and the epineurium in general are discussed in relation to information available on other molluscs.