Some aspects of toxic secretions accumulation in mammalian organisms

А qualitative method was used in the study. The article describes the terrain of the studied territories, the heterogeneity of the biotic component, the description of the aspects of the accumulation of toxic excretions on mammalian organisms.During the investigation, the main environmental pollutants in the Pavlodar region and their impact on the organisms of mammals were studied. Catching of animals is carried out according to standard methods using accounting lines: trap-lines and trapping grooves. The aspects of bioaccumulation of fluorine, benz (a) pyrene, heavy metals (lead, zinc, arsenic, mercury) in the organisms of animal populations inhabiting the urban areas of Pavlodar region have been determined. The main fluoride depot is bone tissue. Heavy metals tend to accumulate in the fur of mammals, as well as in the liver, kidneys, lungs and genitals. The most dangerous for animal health is benzo (a) pyrene, which can accumulate in adipose tissue. Benz (a) pyrene, being the strongest mutagen, can lead to the formation of malignant tumors. The degree of accumulation of toxic secretions directly depends on the habitat of animals and the type of food. It was found that contaminants can accumulate in bone, connective and epithelial tissues.