title: Coronary arteries of the European bison (Bison bonasus).
abstract: BACKGROUND
  The European bison (Bison bonasus) is an endangered species. More information on its anatomy is needed as only few studies have been published. This study is the first report on the morphology of the coronary vessels. Given the anatomical similarity between the European bison and other ruminants, the results of this study can be applied to other species, including endangered ones.
  
  
  RESULTS
  The study was conducted on 70 hearts of European bisons of both sexes, aged 5-20 years, with an average body weight of 449 kg. A distinct view of subepicardial arterial vessels was obtained by filling them with dyed synthetic latex (LBS 3060) and Plastogen G. There was a division of the common trunk of the left coronary artery into the interventricular paraconal branch and the left circumflex branch in 63 individuals (90 %). In five individuals (7.1 %), the presence of a third vessel, which was a branch of the interventricular septum, was observed. There was a lack of a common trunk in two individuals (2.9 %). Ramifications of the interventricular paraconal branch to the wall of the left ventricle were significantly larger than those to the wall of the right ventricle. In 17 individuals (24.3 %), the right coronary artery extended into the subsinuosal interventricular branch.
  
  
  CONCLUSIONS
  The blood supply to the heart in bisons is provided by the left and right coronary arteries. In all the studied specimens, the left coronary artery was better developed than the right coronary artery.
authors.affiliation: Department of Morphological Sciences, Faculty of Veterinary Medicine, Warsaw University of Life Sciences, SGGW, Nowoursynowska 159, 02-776, Warsaw, Poland. marta_kupczynska@sggw.pl.
authors.forename: Marta
authors.initials: M
authors.lastname: Kupczyńska
authors.affiliation: Department of Morphological Sciences, Faculty of Veterinary Medicine, Warsaw University of Life Sciences, SGGW, Nowoursynowska 159, 02-776, Warsaw, Poland. karolina.barszcz@onet.eu.
authors.forename: Karolina
authors.initials: K
authors.lastname: Barszcz
authors.affiliation: Department of Morphological Sciences, Faculty of Veterinary Medicine, Warsaw University of Life Sciences, SGGW, Nowoursynowska 159, 02-776, Warsaw, Poland. katarzyna_olbrych@sggw.pl.
authors.forename: Katarzyna
authors.initials: K
authors.lastname: Olbrych
authors.affiliation: Department of Angiology, Interfaculty Chair of Anatomy and Histology, Medical University of Łódź, Narutowicza 60, 90-136, Lodz, Poland. michal.polguj@umed.lodz.pl.
authors.forename: Michał
authors.initials: M
authors.lastname: Polguj
authors.affiliation: Department of Normal and Clinical Anatomy, Interfaculty Chair of Anatomy and Histology, Medical University of Łódź, Narutowicza 60, 90-136, Lodz, Poland. grzegorz.wysiadecki@umed.lodz.pl.
authors.forename: Grzegorz
authors.initials: G
authors.lastname: Wysiadecki
authors.affiliation: Department of Normal and Clinical Anatomy, Interfaculty Chair of Anatomy and Histology, Medical University of Łódź, Narutowicza 60, 90-136, Lodz, Poland. miroslaw.topol@umed.lodz.pl.
authors.forename: Mirosław
authors.initials: M
authors.lastname: Topol
authors.affiliation: Department of Animal Physiology and Biostructure, Faculty of Veterinary Medicine, Wroclaw University of Environmental and Life Sciences, Kożuchowska 1/3, 51-631, Wrocław, Poland. lestat_v@poczta.onet.pl.
authors.forename: Joanna
authors.initials: J
authors.lastname: Klećkowska-Nawrot
mesh_terms: D000818:Animals; D016164:Bison / Q000097:blood*; D003287:Contrast Media / Q000737:chemistry; D003331:Coronary Vessels / Q000033:anatomy & histology*; D005260:Female; D007091:Image Processing, Computer-Assisted; D008297:Male
chemical_list: D003287:Contrast Media