. Anatomical technology as applied to the domestic cat; an introduction to human, veterinary, and comparative anatomy. Cats; Dissection; Mammals. 33i ANATOMICAL TECBNOLOGT. place of origin of the A. hrachio-cephalica ; (D) the right and left cardiac arteries imbedded in the fat at the line of junction of the auricles and ventricles ; (E) the part marked septum auricularum is not truly part of the septum, but the thick tissue ventrad of it as seen in Fig. 96. § 892. Fig. 94—Preparation.—This represents nearly the dextro-ventral fourth of the heart, but the two planes of longitudinal section are
. Anatomical technology as applied to the domestic cat; an introduction to human, veterinary, and comparative anatomy. Cats; Dissection; Mammals. 33i ANATOMICAL TECBNOLOGT. place of origin of the A. hrachio-cephalica ; (D) the right and left cardiac arteries imbedded in the fat at the line of junction of the auricles and ventricles ; (E) the part marked septum auricularum is not truly part of the septum, but the thick tissue ventrad of it as seen in Fig. 96. § 892. Fig. 94—Preparation.—This represents nearly the dextro-ventral fourth of the heart, but the two planes of longitudinal section are not quite at right angles with each other, and the preparation is so placed that both are foreshortened. The special object is to show the dextral wall of the central part of the aorta, with the dextral dnus Valsalvce and the mouth of the corresponding A. cardiaca. This latter is seen to be so high up that it would not be covered by the V. semilunaris even when fully extended (§ 856). At the left are seen the cavity of the convs arteriosus, with a very small piece of the A. pulmonalis, and one of the semilunar valves, which is decidedly upon a higher (more cephalic) level than those of the aorta (§ 866). It will be understood that the communication between the right ventricle and the conus is behind the septum Fio. 95.—Tbansbction op the Atikicles, Catjdal Aspect ; x § 893. Fig. 95-98—General Description and Mode of Preparation.—These four figures represent transections of the same heart through the auricles (Fig. 95, 96) and through the ventricles (Pig. 97, 98), and as viewed from the caudal (Fig. 95, 97) or the cephalic (Fig. 96, 98) aspect. The heart had been distended and hardened with alcohol (§ 843), and was then transected with the large scalpel at two levels. In comparing the figures as representing continuous parts of the same organ, Fig. 97 is to be imagined inverted upon Fig. 98, the inversion being from left to right; then Fig. 96
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