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Comparative histological, histochemical and electronmicroscopical investigations on the lacrimal glands - IV. Dog

Zeitschrift für Zellforschung und Mikroskopische Anatomie, ISSN: 0302-766X, Vol: 88, Issue: 1, Page: 23-38
1968
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  • Citations
    8
    • Citation Indexes
      8

Article Description

The general structure of the dog lacrimal gland - a mucous gland - consists of acini, tubuli and striated ducts. The acini and tubuli are composed primarily of pyramidal shaped cells, whose major portion consists of locules of a slightly electron dense substance with a delicate open network of fine dense strands. This area presumably represents mucin. At the base of the cell are crowded the nucleus, mitochondria, endoplasmic reticulum and Golgi membranes. The vacuoles of mucin are delineated by compressed strands of membranes, cytoplasmic granules and occasional mitochondria. Staining of paraffin sections in Astrablue, Alcianblue, Ruthenium-Red and PAS revealed the presence of large positive granules (acid mucopolysaccharides). The ducts are closely similar to the proximal convoluted tubules of the kidney. The mitochondria are numerous, elongated and are oriented in the long axis of the columnar cell. The base of the cells is highly cleft by deep infoldings of the plasma membrane. The enzyme pattern of the epithelial cells of the ducts is characterized by high activities of LDH, SDH, NADH-T-Red, NADPH-T-Red and cytochrome oxydase. © 1968 Springer-Verlag.

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