The microanatomy and ultrastructure of the feline and canine thoracic duct and afferent lymphatics were studied by scanning and transmission electron microscopy. We found that the lymphatic vessels were always terminated by ostial valves of two shapes, crescent- and navicular-like, in a ratio of 4:1. Specific regulatory structures along the free edges of the valves, including marginal thickenings and buttresses, are described. The tissue and cellular organization of the valve endothelium showed distinct peculiarities, particularly in the orientation and shape of the cells and their microrelief. We found that valvular endothelial cells, especially ¿tip cells¿, which are situated in unfavourable lymphodynamic conditions, were characterized by an increased volume density of intermediate (probably vimentin-based) filaments, suggesting an accommodative mechanism involving such filaments.

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The three-dimensional cyto-architecture and ultrastructure of cells composing the different regions of the tunica media of canine and feline thoracic ducts (ThD) were investigated by scanning and transmission electron microscopy. The tunica media of the intervalvular regions consists of 2-4 layers of circularly oriented ribbon-like smooth muscle cells (SMCs) of the contractile phenotype. Spot-like membrane contacts similar to gap junctions were observed between SMCs. In the parietal part of the valve’s sinus (PPVS), modified SMCs containing large lipid droplets were found. Occasionally, in the upper thoracic part of the ThD in the PPVS, we observed cardiomyocyte-like cells (CMLCs) arranged as circularly oriented bundles. Frequent interdigitation contacts were formed between SMCs and CMLCs, suggesting a possible involvement of the latter cell type in pacemaker activity of the ThD.

The article discusses issues related to the conceptualisation of digital capital and the mutual influence of it and the labor market in the modern economy. The digital transformations taking place in modern times have significantly changed the living and working conditions of individuals, which is reflected in theoretical studies. The purpose of the article is to assess the possibilities of interconnection and mutual influence of the Russian labor market in the digital economy and digital capital of workers and organisations. Research methods: analysis of theoretical literature, foreign and domestic experience, analysis of statistical data and forecasts regarding the future labor market, made by consulting companies and government organisations. As a result of the study, conclusions were drawn about the existence of mutual relations between digital capital and the labor market, leading to the emergence of new forms of labor (freelance, remote employment), to the disaggregation of organisations and the active use of outsourcing, to the emergence of a new class-precariat, etc. It is assumed that the main factor in the interaction of the labor market and digital capital is the digital divide or the digital divide. The conclusion is made about the need for government decisions in the field of education and employment in order to reduce the digital divide, balance the labor market and create digital capital.