Dynamics in the hemomicrocirculatory bed of the cattle honeycomb bag

Stavropol State Agrarian University, Zootekhnichesky lane, 12, Stavropol, 355017, Russia

^* Corresponding author: spygova@yandex.ru

Abstract

The study was conducted on 60 heads of black-and-white cattle of six age groups: 1 day, 30 days, 3 months, 6 months, 18 months and cows 4-5 years old. Injection, morphological and morphometric methods were used. It was found that the hemomicrocirculatory bed of the honeycomb bag has typical links. The diameter of arterioles in the first-order ridges increases by 30.5% during the study period, but significant changes are observed only between the age groups of 3 months – 6 months, 6 months-18 months, these differences are 8.3% and 10.7%, respectively. In the capillary link, significant changes are observed between the age groups of 6 months-18 months and 18 months-4-5 years, which is 10.0% and 24.8%, respectively. In the link of postcapillary venules, the diameter of the vessels during the study period increases by 16.9%. In the link of collecting venules, significant changes (p≤0.01) in the diameter of vessels were observed between the age groups of 3-6 months and 6-18 months, which is 22.9% and 8.2%, respectively. In lactating cows (4-5 years old), in addition to wide capillaries, we found postcapillary venules with a diameter of 14.80 to 27.20 µ in the papillae of the lamina mucosa propria.