. The American journal of anatomy . 35. 36 37 Fig. 34 Course of the fibers in the heart of an embryo 17 mm. long. The view isfrom behind. Fig. 35 The same as fig. 34 from the heart of an embryo 25 mm. long. The fiberswhich pass to the base on the right ventricle are present. Fig. 36 The same as fig. 35, from an embryo 27 mm. long. Fig. 37 The same as fig. 35, from another embryo 27 mm. long (Xo. 33). the venous and arterial ends remain circular but there are markeddeviations at the apex which correspond with the kinking at thispoint. Those fibers that arise from the bulbo-ventricular groovein


. The American journal of anatomy . 35. 36 37 Fig. 34 Course of the fibers in the heart of an embryo 17 mm. long. The view isfrom behind. Fig. 35 The same as fig. 34 from the heart of an embryo 25 mm. long. The fiberswhich pass to the base on the right ventricle are present. Fig. 36 The same as fig. 35, from an embryo 27 mm. long. Fig. 37 The same as fig. 35, from another embryo 27 mm. long (Xo. 33). the venous and arterial ends remain circular but there are markeddeviations at the apex which correspond with the kinking at thispoint. Those fibers that arise from the bulbo-ventricular groovein front encircle the left ventricle and enter the ventricular sep- 40 His, Anat., mensch. Embryonen, Bd. 3, S. 177, makes a statement which isjust the opposite of mine. • 298 FRANKLIN P. MALL turn behind quite high up so that they form its border just belowthe interventricular foramen. Those that arise behind encirclethe right ventricle and enter the heart in front of through the an-terior longitudinal sulcus. Now as the heart grows by


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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1912