Abstract
The results of the ultrastructural analysis of rats’ Sertoli's cells at the stages of animal adaptation to low temperatures are presented. It was established by the method of transmission electron microscopy that cells with ultrastructural signs of functional tension appear in the population of Sertoli's cells and their purpose is to maintain the secretory function. In Sertoli's cells, hyperplasia and dilatation of elements of the smooth endoplasmic reticulum are observed. They are marked after the 1st week and onset by the 4th week of adaptation. After 4 weeks of adaptation, some ultrastructural signs of depletion are observed in the form of vacuolization of the cytoplasm, enlightenment of the cell matrix, accumulation of myelin-like structures, reduction in the number of mitochondria. The observed ultrastructural changes in the functional activity of Sertoli's cells may be the cause of spermatogenesis disorders accompanied by loss of germinative cells.
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