Abstract
Many studies focus on the morphological changes of tissues and organs in the conditions of the external environment. Such practical orientation appeared due to the great interest in the deterioration of ecologicalenvironment, the emergence of a variety of adverse factors in the workingenvironment and everyday life. It is known that even in small doses thatdo not cause the expressed toxic effects, xenobiotics, petroleum products,heavy metals, rare earth elements and others may cause effects leadingto maladjustment of the organism and disease. There are just a fewworksdevoted to studying the issue of complex action of crude oil in the wholeorganism of the animal hematological processes in mammals, developingunder the influence of crude oil. This makes the study of the problem of oilpollution on animals and humans actual according to the hematology andphysiological indicators. In this regard, we conducted a study to determinethe effects of crude oil influence on hematological parameters of rodentsreceived by them with food and water in a laboratory experiment.Key words: oil, hematology, leukocytes, lymphocytes, red blood cells,decapitation, toxic substances.