The Heart. 



Arcus aortae Eamus dexter a. piilmonalis 



367 



Ventriculus . 

 sinister 



Basis cordis 



Bamus sinister a. pulmonalis _ 



Vv. pulmonales sinistrae __ - "M-^ 



Ligamentum 

 V. cavae sinistrae 



V. cava superior 



-^ Vv. pulmonales dextrae 



Position of reflection 

 of the pericardium 



V. cava 

 "inferior 



Sulcus 

 terminalis 



Appendix 

 auricularis 

 posterior 



A trium 



dextrum 



Sulcus 

 coronarius 



_ Ventriculus dexter 



Sulcus longitudinalis posterior 



^ 



Apex cordis 



Incisura [apicis] cordis 



412. Th6 heart, moderately distended, viewed from below. 



(Fades diaphragmaiica.) 



The heart: the fore -chambers or atria are separated from the ventricles by a groove, 

 the sulcus coronarius (0. T. auriculoventricular groove) which is usually filled up with blood- 

 vessels and fat; it runs nearly perpendicular to the long axis drawn from the apex to the 

 middle of the base and is in part hidden on the sternocostal surface by the beginning of the 

 a. pulmonalis and aorta. The sulcus lonr/itudinalis posterior (0. T. posterior interventricular 

 groove) runs fairly straight on the inferior surface, corresponding to the septum between the 

 two ventricles ; the sulcus longitudinalis anterior (0. T. anterior interventricular groove) runs 

 on the upper surface, twisted so as to be somewhat S - shaped from the base toward the apex. 

 The latter sulcus begins, covered by the left auricle (0. T. auricular appendix), on the left 

 side of the a. pulmonahs and meets the former at the right of the apex of the heart in 

 a shallow groove, the incisura [apicis] cordis. 



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