For the analysis of systems of a bioregulation in an organism, the parametrical model is offered. The structure of parametrical systems of a regulation and their role in maintaining of a homeostasis is described. The regulation complexes providing a reversible regulation of parameters are described. Special characteristics of humoral systems and importance of process of deactivation of hormones and other active materials used biologically are considered. The offered method of the analysis allows to gain additional knowledge of functioning of biological objects.