Abstract
Aim. To carry out morphological analysis of the changes in diameter of fetal and adult intraorgan microvessels of the lower third of esophagus. Materials and methods. Anatomical and histological methods were used to reveal the components of hemomicrocirculatory canal. The lower third of esophagus was studied in 18 human fetuses in the terms of 13, 23, 26, 32, 36 weeks of development, in 7 dead adults aged 41 to 50 years, who did not suffer from esophageal and hepatic diseases in the course of life. Results. Reliable age changes in external diameter of human esophageal arteries, veins, arterioles, capillaries, postcapillaries and venules using nonparametric statistical methods were detected. Conclusions. In dynamics of prenatal development, there occur unequal changes in capillary diameter: increase during the week 23 of gestation (up to 4,98 ± 0,11 mcm, p = 0,005), decrease beginning from the weeks 26 to 32 (4,07 ± 0,14 mcm, p = 0,000) and rise by the week 36 (5,40 ± 0,17 mcm, p = 0,000). Diameter of capillaries of the lower third of esophagus in adults is 9,43 ± 0,24 mcm ( p = 0,000).
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