. The comparative anatomy of the domesticated animals. Veterinary anatomy. 502 THE CIBCJLATORY APPARATUS. These two faces respond, thi-ough tlie medium of the pericardium, to the plurfe and the pulmonary lobes ; the latter separate them from the thorax, ex- cept towards the middle and apex of the organ, where these faces come directly in contact with the thoracic parietes through the notch at the inferior border of the lung, and which we know is more marked in the left than the right. The borders are thick, smooth, and rounded. The anterior, formed by the risht ventricle, is very ''' oblique f
. The comparative anatomy of the domesticated animals. Veterinary anatomy. 502 THE CIBCJLATORY APPARATUS. These two faces respond, thi-ough tlie medium of the pericardium, to the plurfe and the pulmonary lobes ; the latter separate them from the thorax, ex- cept towards the middle and apex of the organ, where these faces come directly in contact with the thoracic parietes through the notch at the inferior border of the lung, and which we know is more marked in the left than the right. The borders are thick, smooth, and rounded. The anterior, formed by the risht ventricle, is very ''' oblique from above to below, and befoi'e to behind ; it then inclines on the sternum more or less, according to the sub- jects. Tlheposterior border, much shorter than the anterior, is nearly vertical. Superiorly, it is sejiaratcd from the dia- phragm by the lung; but, below, it is quite close to that muscular septum. The apex, or point of the ventricular cone, is blunt, slightly rounded, turned to the left, and formed entirely by the left ventricle. The base responds on the right, in front, and behind, to the auricular mass ; it gives exit on the left, and a little in front, to the two arterial aortic and pulmonary trunks. B. Auricular Mass.— Elongated from before to be- hind, disposed like a crescent above the right side of the base of the ventricles, con- stricted in its middle part, on the limit of the two auri- cles, the auricular mass pre- sents for study three faces, two extremities, and a base. TliO superior face is di- vided by a middle constric- tion into two convex sections, horizontal or auriculo-ventricular branch; o, Ven- each of which corresponds to tricular branch of the cardiac vein; p, Auriculo- an auricle. The anterior, or ventricular branch of the same. • i i i- i xi • right section, shows the in- sertion of the anterior vena cava and vena azygos; the posterior, or left, that of the pulmonary veins. The trachea, bronchi, and pulmonary artery pass above this fac
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