Detailed dissection of heart

Interior of right atrium, posterior wall

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Image #121-1

Detailed dissection of heart Interior of right atrium, posterior wall An opening has been made in the anterosuperior part of the wall of the right atrium. Parts of the wall have been reflected to reveal the interior of this chamber. The heart has been positioned with its apex directed downward. 1 . Right pulmonary artery 2 . Right pulmonary veins 3 . Intervenous tubercle 4 . Inferior vena cava 5 . Valve of inferior vena cava 6 . Valve of coronary sinus 7 . Pectinate muscles (in reflected part of atrial wall) 8 . Position of atrioventricular node (covered by endocardium) 9 . Right atrioventricular opening 10 . Crista terminalis 11 . Superior vena cava 12 . Pericardium (cut along line of reflection onto heart) 13 . Crista terminalis (cut across, also see 10) 14 . Border of fossa ovalis 15 . Fossa ovalis 16 . Right auricle 17 . Fat overlying coronary sulcus 18 . Right ventricle