THE HEAliT. 



501 



having a right and left face, an' anterior and posterior border, an apex, and a 

 base. 



The right face, smooth and rounded, is traversed by a vascular furrow 

 parallel to the axis of the heart, and which divides this face into two 

 sections : an anterior, belonging to the right ventricle ; and a posterior, less 

 extensive, forming part of the left ventricle (Fig. 259). 



The left face, disposed in the same manner, also shows a groove on the 

 limit of the two ventricles, whose direction slightly crosses the great 



Fig. 258. 



THE HEART AND PRINCIPAL VESSELS; LEFT FACE. 



a, Right ventricle; 6, Left ventricle; c, Right auricle; d, Left auricle; e, Pul- 

 monary artery; e', Obliterated arterial canal; /, Pulmonary veins; g, Anterior 

 aorta ; A, Left axillary artery ; i, Right axillary artery, or brachio-cephalic 

 trunk ; j, Origin of the dorsal artery ; k, Origin of the superior cervical artery ; 

 I, Origin of the vertebral artery ; m, Origin of the inferior cervical artery ; n, 

 Origin of the internal thoracic artery ; o, Origin of the external ditto ; p, Carotid 

 arteries; q, Posterior aorta; r, Anterior vena cava; s, Trunk of the axillary 

 vein ; t, Trunk of the internal thoracic vein ; u, Trunk of the dorso-cervical 

 vein ; u, Posterior vena cava ; v', Embouchure of the hepatic and diaphragmatic 

 veins ; x, Vena azygos ; ?/, Thoracic duct ; z, Embouchure of that vessel, placed 

 near the origin of the anterior vena cava. 1, Right cardiac artery ; 2, Left 

 cardiac artery ; 3, Auriculo-ventricular branch of the latter ; 4, Its ventricular 

 branch ; 5, Cardiac vein. 



diameter of the heart from behind to before, and above to below, and which 

 is much nearer the anterior than the posterior border (Fig. 258). 

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