DISSECTION OF THE THORAX 



413 



(gab) Left atrium (atrium sinistrum) (0. T. left auricle). 

 (gaba) Left auricle (auricula sinistra) (0. T. left 



auricular appendix). 

 (gb) Ventricles (ventriculi cordis). 



(gba) Right ventricle (ventriculus dexter). 



(gbb) Left ventricle (ventriculus sinister). 



(h) Coronary sulcus (sulcus coronarius) (0. T. auriculoventricular 



groove). 

 (i) Anterior longitudinal sulcus (sulcus longitudinalis anterior) (0. T. 



anterior interventricular groove). 

 (j) Posterior longitudinal sulcus (sulcus longitudinalis posterior) (0. T. 



posterior interventricular groove). 

 (k) Notch at apex of heart (incisura [apicis] cordis). 



FIG. 207. 



Vena 

 cava 

 sup. 



Aorta 



Ligam. 

 Botalli 



Aorta- 



Art, pulm. 

 sin. 



A. pulm. Venae s .P ulm - 

 Auric, sin. 



Vena cava 



sup. 

 A. pulm. 



dextr. 



Venae pulm. 

 dextrae 



Vena 



cava 



inf. 



Apex 



The heart : A, from in front and somewhat above and to the right ; B, from behind and somewhat 

 below and to the left. X %. (From Gegenbaur, Lehrb. der Anat. des Mensch., Leipzig, 1899, 7 Aufl., 

 Bd. ii. p. 208, Fig. 502.) 



Blood-vessels and Nerves of the Heart. 



In the sulci on the surface of the heart, the larger trunks of 

 the blood-vessels will be found. Remove the epicardium over 

 these and clean the vessels of adherent fat. The nerves are ex- 

 tremely delicate and difficult to isolate. Study the arteries : 



(a) Right coronary artery of heart (A. coronaria [cordis] dextra). 



(aa) Posterior descending ramus (ramus descendens posterior). 



(b) Left coronary artery of heart (A. coronaria [cordis] sinistra). 



(ba) Circumflex ramus (ramus circumftexus) . 



(bb) Anterior descending ramus (ramus descendens anterior). 



The veins of the heart (Vv. cordis) should next be examined. 

 Pull the apex forward so as to bring the diaphragmatic surface 

 into view. Examine 



