DISSECTION OF THE THORAX 



417 



Study the shape and general relations of the cavity and with 

 the aid of Fig. 209 examine the following: 



FIG. 210. 



V. cava superior 



Line of reflection of_ 

 the pericardium 



Atrium dextrum 



Sulcus coronarius 



Ventriculus dexter 



Arcus aortae 



Ligamentum arteriosum 

 [Botalli] 



Auricula sinistra 



Sulcus longitudinalis 

 anterior 



Ventriculus sinister 



The heart, to show lines of incisions to open the right ventricle. 



(a) Arterial cone (conus arteriosus). 



(b) Supraventrieular crest (crista supraventricularis) . 



(c) Venous orifice (ostium venosum). 



(ca) Tricuspid valve (valvula tricuspidalis) (0. T. right auriculo- 

 ventricular valve). 



(caa) Anterior cusp (cuspis anterior) (0. T. infundibular 



cusp ) . 



(cab) Posterior cusp (cuspis posterior) (0. T. marginal 



cusp ) . 



(cac) Medial cusp (cuspis medialis) (0. T. septal cusp). 



(d) Papillary muscles (Mm. papillares). 



(da) Tendinous cords (chordae tendineae). 

 Is there a "moderator band"? 



(e) Pulmonary artery (A. pulmonalis). 



(ea) Right ramns (ramus dexter). 



(eb) Left ramus (ramus sinister). 



(ec) Ligamentum arteriosum (ligamentum arteriosum). 



27 



