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Ultrastructure of human labial salivary glands. III. Myoepithelium and ducts
Author(s) -
Tandler Bernard,
Denning Carolyn R.,
Mandel Irwin D.,
Kutscher Austin H.
Publication year - 1970
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.1051300208
Subject(s) - myoepithelial cell , biology , cilium , ultrastructure , salivary gland , basal (medicine) , basal lamina , epithelium , cytoplasm , nasal glands , anatomy , saliva , basal body , columnar cell , microbiology and biotechnology , endocrinology , immunohistochemistry , mucous membrane of nose , immunology , flagellum , biochemistry , genetics , insulin , gene
Myoepithelial cells were present between the basal lamina and the acinar secretory cells of human labial salivary glands. In form and disposition, they resembled myoepithelial cells in the major salivary glands. Many of these cells possessed single cilia on their upper surfaces. Such cilia occasionally extended into invaginations of the overlying secretory cell. The intercalated ducts were variable in occurrence. Their epithelium ranged from columnar to squamous, and showed few signs of secretory activity. Few intralobular ducts possessed basal striations. While mitochondria were abundant in non‐striated cells, they were randomly disposed in both basal and apical cytoplasm, and the basal plasmalemma showed only occasional infoldings. The paucity of true striated ducts in labial salivary glands may be responsible for the high concentration of sodium and chloride in unstimulated labial gland salivary secretions.