[Dynamics of the information characteristics of the chemical composition of developing chick embryo organs].

Contents of 7 microelements in the yolk sac and liver have been studied. In the yolk sac wall, entropy decreases, and the organization degree increases; these phenomena correlate well with the known decrease in intensity of heat production and respiration during embryogenesis. The prefetal period of the embryonic development is characterized by entropy decrease in the liver; during the fetal period entropy remains nearly at a constant level.