EVOLUTION OF VASCULAR PLEXUSES OF THE VERTEBRATE BRAIN
Sentyurova Lyudmila Georgievna - Doctor of Medical Sciences, Professor, Head. Department of Biology, Federal State Budgetary Educational Institution of Higher Education "Astrakhan State Medical University", 414000, Astrakhan Region, Astrakhan, Bakinskaya, 121, sentlj2012@yandex.ru
Teply David Lvovich - Doctor of Biological Sciences, Professor, Professor of the Department of Fundamental Biology, Astrakhan State University named by V.N. Tatischev, Russia, 414056, Astrakhan, Shaumyan sq., 1,
Sherysheva Yulia Vladimirovna - Candidate of Medical Sciences, Associate Professor of the Department of Infectious Diseases and Epidemiology, Federal State Budgetary Educational Institution of Higher Education "Astrakhan State Medical University", 414000, Astrakhan Region, Astrakhan, Bakinskaya st., 121,
Morozov Vladimir Dmitrievich - 5th year student of the Faculty of Medicine, Federal State Budgetary Educational Institution of Higher Education "Astrakhan State Medical University", 414000, Astrakhan Region, Astrakhan, Bakinskaya st., 121,
Morphological features of the ventricles of the vertebrate brain are described and possible mechanisms of their maturation in the process of evolution are analyzed. The characteristics of the ratios of the components of vascular plexuses: epithelium, vessels, connective tissue in various classes of chordates are detailed. It has been shown that in lamprey plexus choroids is in close contact with blood vessels, which ensures optimal metabolism. It is noted that in fish there is a complication of the barrier structure: the epithelial plate is represented by cells of different structure. Amphibians continue to complicate the structure of plexus choroids and folding appears for the first time. For the first time, an analogue of the plexus choroids of the lateral ventricles is formed in birds, which is preserved in mammals. In humans, unlike the lower forms of plexus choroids, all ventricles have folding and rather noticeable layers of connective tissue.
Key words: evolution, ontogenesis, vascular plexuses of the brain, vertebrates, morphogenesis
