. The development of the albino rat, Mus norvegicus albinus. Embryology -- Mammals; Rats. 24 G. CARL HUBER stage of the mouse, given by Sobotta and Melissinos, the nuclei of the two cells lie in about their center and essentially in the same plane. In my own material of the 2-cell stage of the albino rat it is not unusual to find the nuclei of the respective cells nearer the opposite poles of the two cells than at their centers, as shown in C, of figure 1. In B of this figure, where the two nuclei appear as lying much nearer the center of the cells, they are in reality placed much as in C, as
. The development of the albino rat, Mus norvegicus albinus. Embryology -- Mammals; Rats. 24 G. CARL HUBER stage of the mouse, given by Sobotta and Melissinos, the nuclei of the two cells lie in about their center and essentially in the same plane. In my own material of the 2-cell stage of the albino rat it is not unusual to find the nuclei of the respective cells nearer the opposite poles of the two cells than at their centers, as shown in C, of figure 1. In B of this figure, where the two nuclei appear as lying much nearer the center of the cells, they are in reality placed much as in C, as is shown by the Fig. 7 Model of the riglit oviduct ot rat No. 59, 2 days. X 10. Not quite the entire oviduct was available for reconstruction, the upper end of the uterine horn thus not shown in the figure. The position of the four 2-cell stages, each of which is outlined in a circle, found within the tube, is shown as if seen through a transparent wall. To determine the position of the segmented ovum in the 2-cell stage in the oviduct, reconstructions were made of two oviducts. In figure 7 is shown a reconstruction of the right oviduct of rat No. 59, killed two days after the beginning of insemination. In preparing the material for embedding, this oviduct was cut not quite at its insertion into the uterine horn. The portion of the oviduct reconstructed measures cm. Nine major loops are shown. The four ova in the 2-cell stage found in this tube are situated in the sixth to the seventh loop at a distance of about cm. from the fimbriated end. This portion of the oviduct falls to segment three of Sobotta's designa- tion. It is lined by non-ciliated epithelium resting on a mucosa with inconspicuous secondary folds, but presenting four or five characteristic major folds. This portion of the oviduct is closely. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearanc
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Keywords: ., book, bookleafnumber30, bookpublisherphiladelphiapa, bookyear1915
