Segmented leukocytes are the youngest leukocytes; they are formed from poorly differentiated precursors in the red bone marrow. In newborn children, the number of segmented leukocytes is several orders of magnitude higher than the content of neutrophils; as the body reaches maturity, this difference becomes smaller. Precursors for segmented maturation are located at the border of the red and yellow bone marrow, directly adjacent to the cells of the neutrophil series, which produce segmented cells in a period of less than a week. Initially, segmented maturation in the body already begins to appear in the form of smaller mature forms and eventually reaches the segmented stage. As a result, the number of cells in white blood increases that have acquired the hereditary ability to resist infections and injuries, which are formed through the synthesis of substances designed to fight pathogenic bacteria in a sick body. Part of the segmented blood tube is concentrated in the spleen; it performs functions such as destroying weak cells from the leukocyte series and removing decay products from the bloodstream. Additional functions also include the destruction of tissue and the destruction of diseased blood elements. In the process of tissue breakdown, the spleen produces antibodies that help the body fight infectious diseases and other pathologies, thereby the body becomes more protected from viruses, infections, bacteria and their destruction, poisoning, etc. The extensive importance of the spleen is ensured by the fact that in this organ in infants, iron is released from the blood, which is necessary for the normal exchange of oxygen flowing in the tissues of the body, therefore, with various deviations in the health of this organ in particular and organs associated with the circulatory system in general, the internal secretion organs suffer. This statement is due to the fact that it is in the splenic apparatus that blood is separated from plasma and red cells are formed, which are responsible for transporting