Fixing structures of initial lymphatic microvessel's valves

Traditional methods for detecting intraorganic lymph vessels give rise to numerous artifacts associated with gross deformation of the valves and irreversible damage to endothelial trabecular structures. The purpose of the work was to provide information on the structural organization of the valves of the initial lymphatic vessels. The object of investigation is the intestinal wall of sexually mature non-native cats (n=5) and dogs (n=3). As a method of investigation, a universal method of elective detection of arihydrophilic structures was used. As a result of the study, it was established that the valves of the initial lymphatic microvessels have complex fixing structures that prevent their prolapse and the development of functional deficiency with retrograde lymph flow. The mechanisms of contractile activity of the non-muscle lymphatic capillaries capable of changing their lumen due to the perithelium, trabeculae of the endolymphatic system, and sling filaments are discussed.