[The quantitative evaluation of the involutional changes in the kidney micropreparations as the method for the determination of the human biological age].

The objective of the present work was to study age-specific histomorphological changes developing in the kidneys in the course of ageing with special reference to the determination of the number of renal glomeruli in the field of vision during the microscopic examination of histological preparations. The study revealed the significant difference between the number of the renal glomeruli in the subjects under and above 50 year old. The results of the work were used to develop the method for the quantitative evaluation of the involutional changes in the kidneys for the determination of the human biological age in the combination with other approaches.