Intestinal lymphoid tissue changes in the cortisone-treated Wistar rat.

This paper continues the previous investigation of the Department on the lymphoid tissue of central and peripheral lymphoid organs under different experimental conditions. The morphological reactional modalities of the intestinal lymphoid tissue in the male Wistar rat were followed up under endocrine imbalance conditions following cortisone administration. Seven days after administration cortisone induced a hyperplasia of the intestinal lymphoid tissue in parallel with a depletion of the lymph node parenchyma and a hypercellularity of bone marrow.

Dynamics of regeneration in skeletal muscle following localized heat injury.

Local heat applied to rat skeletal muscle determines sudden and brutal necrosis followed by a process of regeneration which develops in a continuous and discontinuous mode. The complex cytohistological and histochemical modifications have been simultaneously followed up. Results may be summarized as follows: during the first 6 to 70 hours after heat application, a morphologica disorganization occurs at the level of both muscle fibers and muscle intertice.