Distribucija krvnih sudova jetre tekunice (Spermophilus citellus)

Abstract

Cilj ovog rada je bio da se ispita distribucija arterije i portalne vene portalnog sistema jetre tekunice (Spermophilus citellus) i dobijeni podaci uporede sa onima kod pacova, kunića, zamorčeta i nutrije. Jetra tekunice prima kiseonik i hranljive materije preko krvi iz dva velika krvna suda: portalne vene (v. portae) i jetrene arterije (a. hepatica propria). Portalna vena nastaje iz sliva tri glavne vene: v. gastropancreaticoduodenalis, v. gastrolienalis i v. mesenterica cranialis. Portalna vena skuplja vensku krv iz želuca, pankreasa, slezine, svih creva osim pravog creva (rectum). Portalna vena ulazi u portalni žleb na jetri zajedno sa jetrenom arterijom. Pet venskih grana različitih veličina odvajaju se od portalne vene i granaju se u odgovarajuće režnjeve jetre. Krv iz jetre odvode jetrene vene koje počinju sa centralnim venama u jetri. Tri velike jetrene vene i dva venska stabla odvode krv iz svih režnjeva jetre u kaudalnu šuplju venu u toku njenog prolaska kroz jetru. A. hepatica propria snabdeva jetru i žučnu kesu oksigenisanom krvlju. A. hepatica propria izlazi iz jetrene arterije (a. hepatica), koja je treća grana celijačne arterije. U portalnom žlebu, a. hepatica propria se deli u dve grane, od kojih leva grana dovodi arterijsku krv u levi režanj jetre, a desna grana u ostale režnjeve jetre.

The aim of this paper was to study distribution of the hepatic artery and portal vein of the portal system of the liver in ground squirrels (Spermophilus citellus) and compare these data with those concerning the rats, rabbits, guinea pigs and nutrias. The liver of the ground squirrel receives the oxygen and nutrients through blood from two large blood vessels: portal vein and hepatic artery (a. hepatica propria). The portal vein is formed by the confluence of three main venous blood vessels: v. gastropancreaticoduodenalis, v. gastrolienalis and v. mesenterica cranialis. It collects venous blood from the stomach, pancreas, spleen and all of intestines except the rectum. The portal vein enters the porta hepatis on the liver together with the hepatic artery. Five venous branches of different size separate from the portal vein and ramify into the respective liver lobes. Blood leaves the liver through the hepatic veins that start with the central veins. Three large hepatic veins and two venous trunks drain lobes of the liver and enter the caudal vena cava as it passes through the liver. A. hepatica propria supplies the liver and gallbladder with oxygenated blood. It raises from the hepatic artery (a. hepatica) wich is the third branch of the celiac artery. A. hepatica propria in the portal fissure is divided into two branches, of which the left branch brings arterial blood to the left hepatic lobe, and the right branch brings it into other liver lobes.