The natives of the North have lived under extreme conditions through ages. The relation between natives and the environment is most clearly revealed from aerosols and food chain. We have made use of the element composition of atmospheric aerosols, of the blood of Tundra Nenetzs, Chukchi, Eskimos and Russian inhabitants of Novosibirsk, determined earlier by the method of X-ray fluorescence analysis using synchrotron radiation (SRXRF). The work was performed using the infrastructure of Center "Siberian Synchrotron and Terahertz Radiation Center (SSTRC)" on the basis of the VEPP-3, INP, SB RAS. The food ration of the natives includes venison, fish and berries whose element composition was studied using the same method. The following elements were determined in blood, atmospheric aerosols and food components: K, Ca, Cr, Mn, Fe, Co, Ni, Cu, Zn, Br, Sr, Zr, Pb. The goal of our work is to reveal the interrelation of the chemical elements, contained in human blood, in food components and in atmospheric aerosols of a certain geographical medium. The relation between the multielement blood composition of various human populations and the characteristics of the environment has been studied by the method of correlation analysis. The dependence of the values studied is reflected by the linear regression equation: у = a + b•x, where у and х are the logarithms of the geometric means of the concentrations of substrate elements. The correlation coefficients for each pair of studied substrates vary within the limits r = 0.8-0.89 at (p=0.05) and characterize the degree of the closely relation between objects. Thus, a close relation has been established on a regional level between the concentrations of elements in human blood, in atmospheric aerosols, and in food components.