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Biomedical subjects

V V Kovanov

Publications and source records attributed to V V Kovanov.

At least 37 records · Page 2Linked to original sources
PubMed1977

[Fascial-cellular sheath of the superior mesenteric artery and its branches].

Fascial-adipose tissue sheaths of the superior mesentery artery consist of: a proper fibrous tunic separated by a paravasal fissura from the external layer of the arterial wall; an adipose tissue coupling with vascular and nervous plexus--around the vessels, and a fascial case which isolates the adipose tissue coupling from the surrounding adipose tissue. The fascial case is more dense around the trunk and less dense around the branches of the superior mesentery artery. The work presents the data of the development of the fascial-adipose tissue sheaths and their age-dependent changes which result in a considerable exhaustion of these sheaths at an old age, in deposition of adipose tissue between the fascial plates. The thickness of the fascial-adipose tissue sheath of the superior mesentery artery varies, depending on age, from 5 to 12 mm. It is considerably more developed than similar fascial-adipose tissue sheaths of the celiac trunk and the inferior mesentery artery, is of great applied importance for novocain blockade of the paraarterial nervous plexus.

Adolescent↗
PubMed1975

[Ultrastructure of human hepatocytes in early prenatal ontogenesis].

The structure of hepatic cells was studied in 40 human embryos and fetuses from 4 to 16 weeks of intrauterine development. Depending on the differentiation degree of organells and their amount in the hepatic cell of the embryo and fetus three types of hepatic cells are distinguished: slightly differentiated, transitional and differentiated cells. In the course of early prenatal ontogenesis the amount of slightly differentiated hepatic cells diminishes and the amount of transitional and differentiated forms increases. Glycogen granules are found in the embryo hepatic cells from 7-8 weeks of intrauterine development, and in the course of further embryonic development one can speak of establishment of the protein-forming function of the liver on the basis of increased amount of elements of the endoplasmic network and the presence of numerous ribosomes and polysomes in the cell. The hepatic cells of 14-16 week embryos have well pronounced sinusoid and biliar poles.

Cell Nucleus↗