[Role of the venule and lymphatic links of microcirculation in transcapillary exchange at the level of the functional unit of an organ].

Fluorescent contact biomicroscopy has shown the presence of the protein permeability gradient in postcapillary and venular parts of the microvascular bed of the rat mesentery and stomach. Albumin and globulin that egressed into extravascular spaces were reabsorbed by lymphatic microvessels. Fluorescent protein was also detected in the form of golden granules in the endothelium of venules and in pericytes adjacent to the venular parts. The data obtained are discussed in the light of the role of venular and lymphatic microvessels in transcapillary exchange at the level of the functional organ element.