Сравнительная характеристика микроскопической организации рецепторного аппарата дополнительной обонятельной системы бобра обыкновенного и овцы

Abstract

In the article, in a comparative aspect, the description of the tissue and cellular organization of the vomeronasal organ (VNO), its vascular system and innervation in two species of animals of different habitats – the common beaver and the Katada sheep breed is given. It is shown that in the studied animals, in particular, the epithelial lining of the lateral and medial walls, has general patterns characteristic of the mammalian vomeronasal system. The innervation of the EIT of a beaver and a sheep has no significant differences between them. At the same time, the sheep's EIT has a more complex surface relief, resembling an inverted letter of the Greek alphabet "delta", which is a species-specific feature of this animal species. In addition, the cavity of the beaver is located ventromedially with respect to the central vein, and the sheep is located dorsomedially. Along with this, in the ventral part of the epithelial layer of the beaver, there is a depression lined with a multilayer cubic epithelium, which is not found in the sheep's EIT. Also, in the submucosal base of the lateral wall of the beaver's EIT, there are single neurons that are absent in the sheep's EIT. The submucosal base of the sheep's EIT, in comparison with the submucosal base of the beaver's EIT, contains a large number of serous glands concentrated mainly along the perimeter from the central vein, there are also single groups of mucous glands, whereas in the beaver's EIT, these types of glands are extremely few and concentrated dorsally in relation to its cavity.