. The development of the albino rat, Mus norvegicus albinus. Embryology -- Mammals; Rats. Fig. 26 Longitudinal sections of egg-cylinders ot the albino rat, showing the anlage of the antimesometrial and mesometrial portions of the proainniotic cavity. X 200. A, rat No. 17, 8 days, 17 hours; B and C, rat Xo. 81, 7 days, 22 hours, after insemination. A, shows the very beginning of the development of the antimesometrial portion of the proamniotic cavity developing within the ectodermal node; C shows the beginning of the proamniotic cavity develop- ing in the extraembryonic ectoderm; , ectop
. The development of the albino rat, Mus norvegicus albinus. Embryology -- Mammals; Rats. Fig. 26 Longitudinal sections of egg-cylinders ot the albino rat, showing the anlage of the antimesometrial and mesometrial portions of the proainniotic cavity. X 200. A, rat No. 17, 8 days, 17 hours; B and C, rat Xo. 81, 7 days, 22 hours, after insemination. A, shows the very beginning of the development of the antimesometrial portion of the proamniotic cavity developing within the ectodermal node; C shows the beginning of the proamniotic cavity develop- ing in the extraembryonic ectoderm; , ectoplacental cone or Trager; , parietal or transitory ectoderm; , extraembryonic ectoderm; , vis- ceral entoderm in B and C, the cells of this laj'er showing the anlage of the three zones showing absorption of maternal hemoglobin; , antimesometrial portion of proamniotic cavity, developing in the ectodermal node; , primary embrj-onic ectoderm; , ectodermal vesicle; , mesometrial portion of the proamniotic cavity, developing in the extramebryonic ectoderm. 78. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Huber, Gotthelf Carl, 1865-. Philadelphia, Pa
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