. The American journal of anatomy . Fig. 13 Sagittal section. Embryo 14mm. long (Xo. 144). X Fig. 14 Coronal section. Embryo mm. long (No. 424). X 24. other two embryos (fig. 12). The opening is gradually becomingsmaller in the following embryos in the order of their enumera-tion, No. 423 (), 144 (14, fig. 13), 424 (17, fig. 14). In 390() it is uncertain whether it is closed or not, in 409 (16) it is DEVELOPMENT OF THE HUMAN HEART 271 just closed, and in 432 (18) it is closed but its connection with theright ventricle is still indicated. That the order of developmentdoes not
. The American journal of anatomy . Fig. 13 Sagittal section. Embryo 14mm. long (Xo. 144). X Fig. 14 Coronal section. Embryo mm. long (No. 424). X 24. other two embryos (fig. 12). The opening is gradually becomingsmaller in the following embryos in the order of their enumera-tion, No. 423 (), 144 (14, fig. 13), 424 (17, fig. 14). In 390() it is uncertain whether it is closed or not, in 409 (16) it is DEVELOPMENT OF THE HUMAN HEART 271 just closed, and in 432 (18) it is closed but its connection with theright ventricle is still indicated. That the order of developmentdoes not correspond with the length of the embryo is due to themethod of measuring; No. 144 was measured on the glass a comparison with the profile drawings of these specimensshows that the order of closure of the foramen corresponds withthe degree of development of the external form. In No. 423 theinterventricular foramen ( mm. in diameter) is situated wellanterior, at the point of junction between the septum aorto pulmo-nale and the right wing of the anterior endocardial cushion. It isu
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1912
