[Quantitative and ultrastructural characteristics of immunocompetent cells in the mammary gland during pregnancy and lactation].

The quantity and ultrastructure of immunocompetent cells (ICC) were evaluated in the of rat mammary gland in dynamics of pregnancy and lactation. ICC found between the alveolar epithelial cells were represented by monocytes, small and medium lymphocytes, including some granule-containing lymphocytes. The quantity of ICC was found to increase in dynamics of pregnancy and to reach a its maximum on day 3 of lactation.

[Age dynamics of cell populations and mast cell density in human bronchial mucosa].

Using the quantitative analysis of mast cell number and granularity, some regularities of their age-associated dynamics were established. In suckling babies and in early childhood the mast cells are small and contain a moderate amount of secretory granules with no signs of degranulation. Henceforth they become larger and are functioning asynchronously.

[Functional morphology of parathyroid cells in disorders of calcium metabolism].

Cell composition of the parathyroid gland was studied under normal conditions, after the hypo- or hyperloading with calcium gluconate and at hyperfunction. Three types of parathyrocytes were established that probably reflect different stages of their life cycle: the first--poorly differentiated cell, the second--mature differentiated cell and the third--degenerated cell. The majority of cells were represented by the parathyrocytes of the 2nd type the varieties of which reflect a non-active (A-subtype) and active (B-subtype) phases of secretion.