Microscopy of the Koala Mandibular (Submandibular) Glands

With 7 figures SUMMARY: Koala mandibular (submandibular) glands are compound tubuloacinar glands, the secretory units of which consist only of serous cells. Intercellular canaliculi occur between the serous cells, which are continuous with a minute lumen that courses through the centre of each secre...

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Bibliographic Details
Published in:Anatomia, histologia, embryologia histologia, embryologia, 2010-12, Vol.39 (6), p.503-508
Main Author: Krause, W.J
Format: Article
Language:English
Subjects:
Animals
Connective Tissue - ultrastructure
Cytoplasmic Granules - ultrastructure
Microscopy
Microscopy, Electron
Phascolarctidae - anatomy & histology
Secretory Vesicles - ultrastructure
Serous Membrane - cytology
Staining and Labeling
Submandibular Gland - anatomy & histology
Submandibular Gland - secretion
Submandibular Gland - ultrastructure
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Summary:With 7 figures SUMMARY: Koala mandibular (submandibular) glands are compound tubuloacinar glands, the secretory units of which consist only of serous cells. Intercellular canaliculi occur between the serous cells, which are continuous with a minute lumen that courses through the centre of each secretory unit. Intercalated ducts are abundant and join striated ducts, the latter being characterized by elaborate basolateral infoldings of the plasmalemma. Secretory granules within the serous cells fail to stain with either the PAS or Alcian Blue (pH 2.5) staining procedures. Ultrastructurally, the secretory granules are membrane bound, and consist of a homogeneous electron lucent material with a fine filamentous texture. The granules tend to coalesce into irregular shaped complexes of secretory material. Discharge of secretory material into the canalicular lumen is a common observation.
ISSN:0340-2096
1439-0264
DOI:10.1111/j.1439-0264.2010.01021.x