[The distribution of the area and volume of filtration in the modular structures of the mesenteric microcirculatory bed in the cat].

When using horseradish peroxidase as a light optic marker of plasmic proteins transport in tissues, it is demonstrated that the area where protein gets into the interstitial space of the mesentery is depended on topography of the venular microvessels. Measuring the filtration area of the metabolic microvessels in the mesenteric module zones, rich in protein, and in the central regions of the module, it is demonstrated that the total surface of the venules can surpass the metabolic surface of all the capillary microvessels. The volume of the fluid which is filtered into the zones, rich in proteins, is 3--4 times as great as the volume sent into the central zones of the module. Ratio of the total volume of the filtrate to the area of the mesenteric mesothelium is 0.02--0.03 mm3 per 1 mm2 of the surface and is constant for various animals. A possibility on convective transport of substances and gradient properties of the peritoneal interstitial space are discussed.