Feneis Pocket Atlas of Human Anatomy 2000 Thieme

17 Incisure of apex of heart. Incisura apicis cor-dis. Notch on the right near the apex of the heart at the site where the longitudinal inter-ventricular grooves become continuous. B

18 Anterior interventricular groove. Sulcus in-terventricularis anterior. Longitudinal groove on the anterior heart surface above the inter-ventricular septum; it contains the anterior in-terventricular branch of the left coronary artery. B D

19 Posterior interventricular groove. Sulcus in-terventricularis posterior. Longitudinal groove on the diaphragmatic surface of the heart marking the position of the interventricular septum; it contains the posterior interventricu-lar branch of the right coronary artery. D

20 Coronary (atrioventricular) groove. Sulcus coronarius. Groove that courses around the heart marking the atrioventricular boundary. B D

21 Right/left ventricle of heart. Ventriculus [dexter/sinister] cordis. Due to functional requirements, the left ventricular wall is thicker than the right. C

22 Interventricular septum. Septum interventric-ulare. Partition between the right and left ventricle marked externally by the anterior and posterior interventricular grooves.

23 Pars muscularis. Muscular part of the inter-ventricular septum; by far the largest and thickest part. C

24 Pars membranacea. Membranous part of the interventricular septum. Located superiorly at the exit of the aorta. It is the shortest, thinnest and most fibrous part of the interventricular septum and arises from the endocardium. C

25 Atrioventricular septum. Septum atrioventric-ulare. Portion of the membranous part of the interventricular septum between the right atrium and left ventricle above the root of the septal cusp. C

26 Right/left atrium of heart. Atrium [dextrum/ sinistrum] cordis. Thin-walled chambers. C

27 Auricle of atrium. Auricula atrialis. Finger-like diverticulum of the right and left atrium. B C

28 Interatrial septum. Septum interatriale. Partition between the right and left atrium.

29 Ostium atrioventriculare (dext. et sin.). Atri-oventricular opening (right/left) between the atrium and ventricle. D

30 Ostium of pulmonary trunk. Ostium trunci pulmonalis. Opening between the right ventricle and the pulmonary trunk. D

31 Ostium of aorta. Ostium aortae. Opening between the left ventricle and aorta. C D

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