Abstract

Age Features of the Structure and Distribution of Lymphoid Formations in the Rectum Wall of Rats. It is established that lymphoid formations of the anal walls have various localizations and thickness of localization depending on the age and sections of therectum. Lymphoid formations in the presphincteric section transitional zone are located as accumulations of lymphocytes. By the age of 3 months lymphoid nodules are formed of them in the presphincteric section and in the transitional zone this process is completed by the age of 6 months. Lymphoid structures are presented by diffuse lymphoid tissue in the inner sphincter. In various zones of the lymphatic canal lymphoid accumulations have various forms.