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Structural Changes of Goat Parotid Salivary Gland: Pre‐ and Post‐Weaning Periods
Author(s) -
Elewa Y. H. A.,
Ichii O.,
Otsuka S.,
Hashimoto Y.,
Kon Y.
Publication year - 2014
Publication title -
anatomia, histologia, embryologia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.34
H-Index - 35
eISSN - 1439-0264
pISSN - 0340-2096
DOI - 10.1111/ahe.12071
Subject(s) - myoepithelial cell , serous fluid , bone canaliculus , saliva , biology , salivary gland , parotid gland , weaning , endocrinology , basal (medicine) , medicine , microbiology and biotechnology , anatomy , chemistry , andrology , biochemistry , pathology , immunology , immunohistochemistry , insulin
Summary Previously, the structure of the adult goat parotid salivary glands ( PG s) was studied. However, little information was elucidated of the juvenile ones. This study aimed to clarify the correlations between the structure of goats' PG s and the nature of food intake among milk‐suckling kids ( MSK s) and diet‐fed goats ( DFG s). The secretory endpieces of the goats' PG s are of the pure serous type. The serous cells in MSK s showed apical accumulation of numerous secretory granules ( SG s) of smaller size and of more intense positive periodic acid‐Schiff reaction. Ultrastructurally, most of the SG s in the DFG s contained peripherally located inclusions that showed dense reaction products for acid phosphatase. In MSK s, the PG s showed less‐developed basal infoldings, sparseness of the inter‐cellular inter‐digitations, fewer inter‐cellular canaliculi and microvilli and also less‐developed myoepithelial cells with fewer and shorter cytoplasmic processes. In conclusion, the less‐developed membrane specializations and myoepithelial cells, as well as the accumulated SG s in the PG s of MSK s, suggest that it secretes less saliva with a little secretory activity than that of DFG s, which may be correlated with the reduced masticatory activity.