| Abstract: | A complex of special structures having compensatory-adaptive character has been found in the umbilical artery wall of a mature dog. The role of the structures revealed is to participate in an active regulation of the blood stream. In the test animals with a model of the blood stream disorder in the iliac artery reservoir, the importance of the structures of its active regulation increases. The investigations performed have stated the fact, that the canine umbilical artery during the postnatal period of ontogenesis actively participates in regulation of the blood stream in the internal iliac artery reservoir. In some cases the umbilical artery plays the role of a blocking artery, in others--as a powerful arteriovenous formation and it is able to participate in distribution and regulation of the blood stream. |
