. 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 thoracis muscles), the area is seen to be almost triangular. The anterior border of the triangle (formed by the apical lobe of the right huig) is at the right fourth costal cartilage and extends across the median plane, ending at the third interchondral space near the costo-ehondral junction. The right border extends from
. 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 thoracis muscles), the area is seen to be almost triangular. The anterior border of the triangle (formed by the apical lobe of the right huig) is at the right fourth costal cartilage and extends across the median plane, ending at the third interchondral space near the costo-ehondral junction. The right border extends from the sternal end of the fourth rib to the eighth chondro-sternal joint. The left border begins at the left end of the anterior border, crosses 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 Left brachial artery Brachiocephalic artery Anterior vena cava Right auricle Pulmonary art<ri/ Conus arteriosii iht ventricle. Posterior vena cava Left ventricle •ipex 1, Pulmonary veins; 2, left : Fig, 612.—Heart op Dog; Left View. vessels and fat in coronary groove; 4. vessels and fat i ?oove; 5J vessels and fat in intermediate groove. by the left (or ventral) longitudinal groove, which begins behind the origin of the pulmonary artery, and joins the right (or dorsal) groove at the right border, thus forming a notch not far from t
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherphiladelphialondon
