[Histogenesis of the thyroid gland in cultivation in diffusion chambers].

The histogenesis regularities and sources of the thyroid gland regeneration in white rats and steppe tortoises under conditions of auto- and allotransplantation in diffusion chambers are described. Dynamics of the reactive changes indicates the heterogenous character of morphofunctional differentiation of the thyroid structures. Differences in the adaptive plastic rearrangement of the thyroid gland of the vertebrates studied are related to the hystogenesis rate and depend on evolutionally fixed stability of the tissue to hypoxic state.