MORPHOLOGICAL FEATURES OF THE LYMPHOID APPARATUS OF THE SPLEEN IN POSTNATAL DEVELOPMENT

In postnatal development, the lymphoid apparatus of the spleen very effectively undergoes a full cycle of age-related restructuring, which indicates obvious immune changes in the body at this age. Thus, the spleen of animals of the age corresponding to the thoracic period looks morphologically quite unprepared: with foci of myelopoiesis in the red pulp, with a relatively small volume of white pulp, presented mainly by periarterial lymphoid sheaths (PALS), predominantly small and average, as well as newly formed lymphoid nodules, enveloped in a halo of the marginal zone with unconvincing and unclear outlines.