LAUSR

BACKGROUND The greater omentum of white rats appears, in basic morphological features (in miniature), to be homologous to the greater omentum of humans. We study of the greater omentum reaction to the catgut implant. After implantation of the catgut thread, it turned out that not only the greater omentum, but also serous formations similar to it, related to the testicles, are involved in the covering of the implant. The aim of the study was to study the general plan of the structure and the principles of morphometric analysis of serous formations of testis in white male rats. MATERIALS AND METHODS The experiment involved 15 white male rats of reproductive age, weighing from 284 to 334 grams. RESULTS It has been established that each testicle of white rats has serous (peritoneal derivatives) formations of two types. One of them is a typical mesentery, with which each testicle is separately fixed to the posterior wall of the pelvic cavity, and the other formation is a free regrowth of a duplication of the serous membrane. It was called the epididymal omentum. According to the algorithm for studying the greater omentum in our previous works, it is noteworthy that the area of ​​the greater omentum is noticeably inferior to the area of ​​the epididymal omentums (F=0.239; p=0.006). So, if the average value of the area of ​​the greater omentum is 2766.51±388.12mm², then the same indicator of the epididymal omentum reaches 4383.36±793.56 mm², with their approximately the same thickness (F=1.35; p=0.291). CONCLUSIONS It has been established that the greater omentum has two, homeomorphic to it, derivatives of the peritoneum, associated with the epididymis, which were justifiably called epididymal omentums and were fully described in the literature for the first time.