• Bacteria vs. Cheek cells
Heart model 1 Superior vena cava Ascending aorta Right atrium Wall of the right atrium Right coronary artery Aortic semilunar valve Cusp of right AV (tricuspid) valve Chordae tendineae Papillary muscle Wall of right ventricle Trabeculae carneae Cusp of left AV (Bicuspid/Mitral) valve Interventricular septum Wall of left ventricle Left ventricle Pulmonary veins Left atrium Wall of left atrium Pulmonary trunk Ligamentum arteriosum Arch of aorta

Heart model 2 Ascending aorta Superior vena cava Right coronary artery Pulmonary semilunar valve Right atrium Opening of the inferior vena cava Cusp of right AV (tricuspid) valve Right ventricle Apex Left ventricle Interventricular septum Left atrium Pulmonary veins Pulmonary trunk Arch of aorta Ligamentum arteriosum