title: The sheep heart: coronary and conduction system anatomy with special reference to the presence of an os cordis.
mesh_terms: D000818:Animals; D001466:Barium Sulfate; D001842:Bone and Bones / Q000000981:diagnostic imaging; D017023:Coronary Angiography; D003331:Coronary Vessels / Q000033:anatomy & histology*; D006325:Heart Atria / Q000000981:diagnostic imaging; D006329:Heart Conduction System / Q000033:anatomy & histology / Q000098:blood supply*; D006346:Heart Septum / Q000033:anatomy & histology; D011689:Purkinje Cells; D012756:Sheep / Q000033:anatomy & histology*; D012849:Sinoatrial Node / Q000098:blood supply
chemical_list: D001466:Barium Sulfate