Histological features of the bladder wall in yorkshire piglets in the age aspect

Yorkshire pigs occupy one of the first places in livestock farms in different parts of the world. This is due to the fact that breeding boars of this breed are widely used by farmers and owners not only of large livestock complexes, but also by private farms for crossing with other breeds of adapted pigs to increase the meat indicators of offspring. Pigs of this breed are very sensitive to sudden changes in ambient temperature, often suffer from overheating or hypothermia, which can affect the health of internal organs and body systems and can lead to diseases of the urinary system in general and in particular the bladder. The purpose of our study is to study the features of the histological structure of the bladder wall in Yorkshire piglets in the age aspect. Cadaver material for the study was delivered to the Department of Animal Anatomy of the Federal State Budgetary Educational Institution of the Russian Academy of Sciences from the Idavang Agro pig breeding complex in Nurma village, Tosnensky district of the Leningrad Region. The study was conducted in three age groups, according to the periodization of pig life: the first stage of development – newborn piglets (1-4 days of the postnatal period); the second stage of development – the first dairy (5-21 days of the postnatal period); the third stage of development – the second dairy (22-45 days of the postnatal period). From the first stage of development, newborn one-day-old piglets were used; from the second stage – animals 10-14 days; from the third – piglets 28-30 days of the postnatal period of ontogenesis. The average body weight of piglets of group 1 is 550 g.; Group 2 is 1800 g.; Group 3 is 3000 g. In total, five piglets were inherited in each age group. The age was determined by the bonus cards and from the words of the chief veterinarian of the farm. To achieve this task, a set of traditional morphological research methods was used: fine anatomical dissection, histological, photographing and morphometry. Histological examination revealed that in Yorkshire piglets, the bladder wall has a typical histological structure and consists of mucous, muscular, and serous membranes. Morphometric indicators of histological structures of the bladder wall were determined and it was concluded that these values of thickness and diameter in males slightly exceed those in females.