Main Article Content
The article analyzes the macro anatomical parameters of the kidneys in early postnatal ontogenesis. Possible mechanism discussed changes in the organometric parameters of the kidneys in the age aspect. It was revealed that by the age of 12 months, the growth rate of the weight of the kidneys increases by 12.1 times and its length by 5.1 times.
The growth rate of organometric indicators of the kidneys by 21 days of age about 16 days of age increases by 19.0%, the thickness of the organ by 31.0%, the width of the kidneys to the levels of the upper pole by 8.0%, the distance between the kidneys to the levels of the upper pole by 21, 0%. In our opinion, this is due to the transition of rats to definitive nutrition. The shape of rat kidneys in early postnatal ontogenesis changes from the neonatal period, and by 6 days of age, it acquires a lenticular shape, by 16 and 21 days of age it acquires the shape of beans.
According to ultrasound examination, the capacity of the kidneys in the abdominal cavity by the age of 12 months increases 12.9 times compared with the neonatal period.