title: [Anatomical studies of the venous vessels in the area of the sinus venosus and v. cava caudalis of the liver in newborn calves].
abstract: Observations, preparations, measurements, and sketches were used to study the site and size of the venous plexus and the venous canal and the number of the liver veins in eleven newborn calves of the Bulgarian Brown breed and crossbreds of the Black-and-white cattle. It was found that there was a well developed venous plexus on the visceral surface of the liver, into which ran the umbilical vein and vena portae. A total of 93 and 162 venous vessels came out of the plexus in the Bulgarian Brown calves, and 96 and 181 - in the crossbreds. The venous vessels, according to their dia, were classified as large, medium, and small ones. The liver veins of the Brown calves varied from 43 to 61, and those of the crossbreds - from 43 to 82. They could also be subdivided into the same size groups. The venous canal with the newborn calves was not obliterated. It is assumed that the greater number of veins which come out of the venous sinus and the liver veins in the newborn crossbreds of the Black-and-white cattle are associated with the functional state of the liver and the genetic substantiation of this high-producing breed.
mesh_terms: D000818:Animals; D000831:Animals, Newborn; D002417:Cattle / Q000033:anatomy & histology*; D006503:Hepatic Veins / Q000033:anatomy & histology*; D008099:Liver / Q000098:blood supply*
vernacular_title: Anatomichni izsledvaniia vŭrkhu venoznite sŭdove v oblastta na sinus venosus i v. cava caudalis na cherniia drob pri novorodeni teleta.