Architectonics of the brown bear's left coronary artery

The  heart,  as  the  central  organ  of  the cardiovascular system, also has its own arterial lines to supply blood to its wall. Currently, the vascularization of the heart in animals has  not  been  sufficiently  studied,  there  are conflicting  facts  from  various  authors  of domestic  and  foreign  origin  regarding  the types of blood supply to the heart in various species  and  breeds  of  domestic  and  wild animals, and there are also inconsistencies in the  topography  of  the  branches  of  the  left and right coronary arteries. The brown bear is a common predator in the Russian Federation,  which  can  often  be  found  in  various public institutions for keeping animals. The purpose of this study is to study the architectonics of the left coronary artery in a brown bear. To study the anatomy of the heart, the corpses  of  brown  bears  aged  three  to  five years were taken. A total of six brown bear hearts were examined. To study the vascularization of the heart of the studied animals, classical and modern anatomical techniques were  carried  out,  such  as  fine  anatomical dissection  and  the  production  of  corrosive preparations using latex. As a result of the study, it was established that the brown bear has  a  predominantly  left  coronal  type  of blood  supply,  since  in  four  individuals  the left coronary artery vascularized the area of the  paraconal  groove,  subsinus  groove  and interventricular  septum.  But  at  the  same time,  it  can  also  be  assumed  that  a  brown bear may have a uniform type of blood supply to the heart, due to the fact that in two individuals the subsinus groove was supplied with blood by the right coronary artery.