[Morphology and development of the arteries of the deferential duct, the pelvic section of the urethra, vesicular and prostate glands in cattle in the fetal and neonatal periods].

The experiments were carried out with 70 cattle male fetuses coming from 8th to 40th week of pregnancy and with 8 newborns aged from 1 to 14 days of life. The pelvic arteries were filled up--through aorta--with rubber latex stained with pigments by means of automatic devices of own design and construction. The age of the fetuses was determined with the Kantorova method. On the grounds of the investigation it has been found that the ductus deferens, the fore-part or urethra, vesicular and prostatic glands in cattle fetuses and newborns are supplied with blood by following arteries: 1) rami ductus deferentis aa. testiculares, 2) arteriae ductus deferentis and 3) aa. prostaticae. In cattle fetuses and newborns the above mentioned twin vessels undergo several developmental quantitative and qualitative transformations. Least of all the transformations pertain to rami ductus deferentis aa. testiculares. As for the arteries of ductus deferens there was observed mutability of mainly individual character, not related to the age of the animal. It concerned, first of all, the variety of places and ways of departure of the arteries from the superior vessels. Finally, developmental transformations of the prostatic arteries manifested considerable dependence on the age of the animals, in this respect differing significantly from those mentioned previously. Generally one can state that the developmental mutability of the arteries studied was almost always superimposed by high-degree individual mutability of those vessels, which so far has not been clearly marked in specialist literature.