. Carnegie Institution of Washington publication. STREETER. Campbell Art Co. Elizabeth, N. J. FIGS. 17 to 22. Sketches of selected cell groups found in the chorionic villi, which are interpreted as blood-vessels in a progressive series of developmental stages. In figure 22 is shown the relation of the endothelium to the surrounding stroma. Enlarged 600 diameters (approx.). FIGS. 23 to 28. A similar series of angioblastic cell-groups found in the wall of the yolk-sac. In this series the endoderm is shown as the upper and the mesoderm as the lower layer. Enlarged 600 diameters (approx.).. Please
. Carnegie Institution of Washington publication. STREETER. Campbell Art Co. Elizabeth, N. J. FIGS. 17 to 22. Sketches of selected cell groups found in the chorionic villi, which are interpreted as blood-vessels in a progressive series of developmental stages. In figure 22 is shown the relation of the endothelium to the surrounding stroma. Enlarged 600 diameters (approx.). FIGS. 23 to 28. A similar series of angioblastic cell-groups found in the wall of the yolk-sac. In this series the endoderm is shown as the upper and the mesoderm as the lower layer. Enlarged 600 diameters (approx.).. 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 Carnegie Institution of Washington. Washington, Carnegie Institution of Washington
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