Pecilarities of morphogenesis of nasal region structures in some carnivora

  • N.B. Kuzniak
Keywords: comparative morphology, prenatal development, nasal region, mammals, domestic dog, domestic cat

Abstract

42 specimens of some Carnivora mammalian (24 – Canis familiaris, 18 – Felis catus) were studied by using a complex of morphological research methods (morphometrics, histological methodics, micromacroscopy, three-dimensional computer reconstruction, statistical analysis). It has been found that morphogenesis of the nasal region in some carnivora (cat and dog) inherent the following common patterns: a) development of nasal cavity starts from the nasal (olfactory) placodes, that have ectodermal origin; b) formation of nasal cavity passes 5 consecutive stages: olfactory placodes, nasal fossa, nasal sacks, primary nasal cavity and definitive nasal cavity; c) formation of the nasal cavity obligatory includes the process of physiological atresia of nostrils, nasopalatine channels and ducts of vomeronasal organ, which precedes by the time palatine processes become horizontal. Regularities of morphogenesis of nasal glands have a certain sequence of development: firstly, lateral nasal gland is laid, then maxillary sinus’ glands, respiratory and olfactory. Embryos of domestic dog and domestic cat of 16th stage of development have the following glands in nasal cavity: pair lateral nasal gland, single respiratory, maxillary and olfactory glands. At the end of prenatal ontogenesis, nasal region in studies species acquires feature of a definitive structure.

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References

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Published
2017-10-27
How to Cite
Kuzniak, N. (2017). Pecilarities of morphogenesis of nasal region structures in some carnivora. Reports of Morphology, 23(1), 14-19. Retrieved from https://morphology-journal.com/index.php/journal/article/view/6
Section
ORIGINAL INVESTIGATIONS