Fig. 6
From: Gross anatomy of coronary veins of the European bison (Bison bonasus)
a – The atrial surface of the heart and the collateral veins of the left ventricle. b – The atrial surface of the heart and the collateral veins of the right ventricle. 1 – the circumflex branch of the great cardiac vein, 2 – the middle cardiac vein, 3 – the apical vein, 4 – the distal collateral vein, 5 – the intermediate collateral vein, 6 – the proximal collateral vein, 7 – the oblique vein of the right ventricle