a Label the following: O Right atrium with pectinate muscle D Left atrium O Right ventricle O Left ventricle O Interventricular septum O Pulmonary trunk O Aorta O Superior vena cava O Left pulmonary veins O Right pulmonary veins D Right atrioventricular (AV) or tricuspid valve O Left atrioventricular (AV) or bicuspid or mitral valve O Right semilunar or pulmonary valve O Left semilunar or aortic valve O Papillary muscles O Chordae tendineae O Trabeculae carneae O Inferior vena cava b Draw in the fossa ovalis.

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