RESUMO
Data are given on the study of functional correlations of the pairs of organs (kidneys-liver and kidneys-lungs) that participate in provision of the functional system of secretion. The correlation of these pairs of organs contribution to the total secretion of metabolites as renal insufficiency grows is characterized by the S-shaped dependence, i.e. by a compensatory increase of the conjoined functions at the early stages and its depression at the graver stages of renal insufficiency. This approach makes it possible to determine the character, terms and significance of the participation of various organs in provision of metabolic homeostasis maintenance long before its failure and to reveal the main links in the pathogenesis of functional disorders of secretion.