Right and left atria, right and left ventricles, caudal and cranial vena cava, aorta, pulmonary artery and vein, The diagram below shows a section through the heart seen from the same direction as the external view in question 1. Pulmonary artery, coronary artery, cranial vena cava. Right atrium, left atrium, right ventricle, left ventricle, aorta, caudal vena cava, Show the positions of the following structures on the diagram. The diagram below shows an external view of the mammalian heart.
