. The American journal of anatomy . Fig. 16 Semidiagrammatic reconstruction of the heart of an embryo 11 (No. 353). The muscle encircling the atrial canal is reduced and the atrio-ventricular bundle is seen passing behind the endocardial cushions to spread overthe ventricular septum below. is also shown. These figures indicate clearly the fate of the pri-mary dividing masses of connective tissue at the base of the heartin the embryo. DEVELOPMENT OF THE HUMAN HEART 175 In young hearts the septum aorto pulmonale encircles the rightostium as shown in fig. 17 and from it the tricusp
. The American journal of anatomy . Fig. 16 Semidiagrammatic reconstruction of the heart of an embryo 11 (No. 353). The muscle encircling the atrial canal is reduced and the atrio-ventricular bundle is seen passing behind the endocardial cushions to spread overthe ventricular septum below. is also shown. These figures indicate clearly the fate of the pri-mary dividing masses of connective tissue at the base of the heartin the embryo. DEVELOPMENT OF THE HUMAN HEART 175 In young hearts the septum aorto pulmonale encircles the rightostium as shown in fig. 17 and from it the tricuspid valve the adult the septum aorto pulmonale blends with the anterior. RO A V. B. Fig. 17 The same as fig. 16 from the heart of an embryo 17 mm. long (No. 296).Most of the muscle wall of the atrial canal is absent. The atrio-ventricular bundleis shown and thp semilunar valves of the aorta are indicated.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1912
