UDC 636.932.2: 611.21
DOI: 10.36871/vet.zoo.bio.202401005
Authors
Peter L. Gorelikov,
Artem A. Demidov,
Moscow State Academy of Veterinary Medicine and Biotechnology – MVA by K. I. Skryabin”, Moscow, Russia
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.
Keywords
vomeronasal organ, vomeronasal nerve, intramural ganglion, vomeronasal organ cavity, hyaline cartilage, ventral nasal passage, nasal cavity, common beaver, sheep, sense of smell
