[Cellular composition of the lamina propria mucous membrane in different segments of ureter in the newborns and children of first years of life].

Cellular composition of the lymphoid tissue in the superior and inferior segments of ureteral mucous membrane was studied using quantitative method in newborns, infants and children of the first years of life on autopsy material (n=12). It was found that during the first years of life lymphoid tissue was poorly developed in the lamina propria of the ureteral mucous membrane and it was represented by diffuse lymphoid tissue. Processes of lymphocytopoiesis were not expressed, while high degree of cell destruction was observed that was increased with age. The content of plasma cells was increased by the early period of infancy, indicating the activation of local humoral immunity. Regional peculiarities included higher content of plasma cells, granulocytes and lower concentration of destroyed cells in the superior ureteral segment as compared with the inferior one. These peculiarities were preserved during all childhood ages.

[Problems of the classification and organization of minor glands located in the walls of the hollow internal organs].

The paper reviews the problems of the classification and anatomical structure of minor glands located in the walls of the organs of digestive, respiratory, and urogenital systems. A number of adequate terms for the description of the structure of the glands, is proposed. Some new data are presented, together with the description of most important regularities in the morphogenesis of various minor glands, including: similar pattern and heterochronism in the rate of ontogenetic development of minor glands, common manifestations of age involution of the minor glands in different organs, taking place at different ages, close microtopographical relations with the lymphoid structures in the organ's walls.

[Mesenteric lymph nodes in rats exposed to emotional stress]. / Bryzheechnye limfaticheskie uzly krys pri deistvii émotsional'nogo stressa.

Structural and functional peculiarities of mesenteric lymph nodes were studied in 40 stressed August rats using micro anatomical methods. The stress was induced by limitation of any movement for 5 hrs every day. Peculiarities and intensity of modifications demonstrated was dependent on duration of stress actions. Significant decrease of cortical substance area, its lymphoid nodules length and width and germinal centre area, fraction of large, medium and small lymphocytes was observed following 5 hrs of the experiment, which was combined with expansion of the area, occupied by medullar substance. On the 2nd d of 5 hrs experiment cortical substance area was widened (on histological section), the number and sizes of lymphoid nodules grew up and lymphoid nodules appeared in medullar bands. On the 3rd experimental day mesenteric lymph node structure gradually restored. It showed control values on the 6th experimental day.

[Inguinal lymph nodes of Rhesus macaque in hypokinesia and combined action of hypokinesia and hypergravity]. / Pakhovye limfaticheskie uzly makakov rezusov pri gipokinezii i sochetannom vozdeistvii gipokinezii i gipergravitatsii.

Peculiarities of microanatomy and cytoarchitecture of inguinal lymph nodes were studied under the effect of hypokinezia and combined effect of hypokinezia and hypergravitation experimentally in mature macaque rhesus monkeys for the first time. The data obtained indicate that on the background of intensive impairing effect of hypokinezia combined action was not only neutralized but the effect of hypokinezia also intensifies immunological action of lymph nodes of monkeys. This was supported by morphological signs and changes in correlation between lymphoid cells: number growth of lymphoid nodules with widened germinal centres and high fraction of mitotically dividing cells, the presence of dense thymus dependent (paracortical) zone and more dense medullar bands, filled basically with small lymphocytes and lowered level of destructive processes in all structural components of lymph nodes.