. The anatomy of the domestic animals. Veterinary anatomy. THE PERICARDIUM AND HEART 743 The area of contact of the pericardium with the chest wall is chiefly ventral, and is best seen with the subject on its back. In this position (after removal of the intercostal and rectus tlidmcis miLseles), the area is seen to be almost triangular. The anterior border of the trian{;lr ifornjivl by the a])ical lobe of the right lung) is at the right fourth costal cartihigc and extends across the incrliun plane, ending at the third interchondral space near tlu' junction. The right bcirder
. The anatomy of the domestic animals. Veterinary anatomy. THE PERICARDIUM AND HEART 743 The area of contact of the pericardium with the chest wall is chiefly ventral, and is best seen with the subject on its back. In this position (after removal of the intercostal and rectus tlidmcis miLseles), the area is seen to be almost triangular. The anterior border of the trian{;lr ifornjivl by the a])ical lobe of the right lung) is at the right fourth costal cartihigc and extends across the incrliun plane, ending at the third interchondral space near tlu' junction. The right bcirder extends from the sternal end of the fourth rib to the cjglith cliimdro-stcmal joint. The left bcjrder begins ;it the left end of the anterior border, the fourth cartilage nearly an inch from its junction with the rib and the fifth and sixth chondro-costal junctions. The heart differs greatly in form and position from that of the larger animals. In diastole it is ovoid and the apex is blunt and rounded. Its long axis is very- oblique. Thus the base faces chiefly toward the thoracic inlet and is opposite to the ventral part of the third rib. The apex is on the left side at the sixth inter- chondral space or seventh costal cartilage, and in close relation to the sternal part of the diaphragm. The stemo-costal surface corresponds largely to the floor of the thorax from the fifth chondro-sternal joint backward. It is crossed obliquely Aorta Pulmonary veins Lift brachial ' "r-lery ,^- BracJdocephalic artery Anterior ven cava Right auricle Pulmonary artery Conns arteriosus Right ventricle. tterior vena cava Left ventricle 1, Pulmonarj- i Fig. 612.—He-vrt of Dog ; Left View. iricle; 5, vf'ssela and fat in coronarj'groove; 4. vessels and fat i dinal groove; 5, vessels and fat in intermediate groove. by the left (or ventral) longitudinal groove, which begins Ijehind the origin of the pulmonary artery, antl joins the right (or dorsal) groove at the right Ijorder, thus form
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Keywords: ., bo, bookcentury1900, bookdecade1910, booksubjectveterinaryanatomy
