MORPHOLOGY OF TONGUE VASCULAR BED CURRENT OF RATS IN HEALTH

At present it is known that the morphology of the tongue mucous membrane is significantly impacted by the state of the internal organs that is manifested indirectly through the nervous and circulatory systems. This necessitates a detailed study of the structure of the tongue vascular system. The aim of this study was to investigate the morphology of tongue vascular bed in intact white rats. The study was performed on 10 outbred white rats of both sexes, weighing 204±0.67 g. The experiment was conducted in accordance with the bioethical norms and ethical principles of work with experimental animals. Traditional paraffin and semi-thin sections were made from the preparations of the tongue and then examined with a light microscope. We have found the tongue vascular bed in white rats by its general characteristics is very similar to the vascular bed morphology of human tongue. We distinguish two relatively autonomous associations of blood micro vessels in the tongue circulatory bed of white rats. The first is represented by a capillary network running through the muscles of the tongue and providing trophism of the muscles and small salivary glands of the tongue. The second is localized in the lamina propria of the mucous membrane and, in turn, is divided into a superficial capillary network in the connective tissue papillae, the main purpose of which is indirect provision of trophic processes of multilayered squamous keratin epithelium, and deep capillary network providing blood supply to the connective tissue. The microcirculatory bed of the tongue mucous membrane in white rats has noticeable differences in metric parameters in the area of the apex, body and basal parts, which must be taken into account when interpreting experimental studies.