. A manual of zoology. Zoology. GENERAL EMBRYOLOGY 147 arises a third germ-layer, which owing to its position between the first two, is called the mesoderm, mesohlast, or middle germ-layer; this naturally can come only from the cell material of the existing germ-layers, indeed only the entoderm seems to participate in it. Two methods can he distinguished in its formation. In one the space between ectoderm and. 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 perf
. A manual of zoology. Zoology. GENERAL EMBRYOLOGY 147 arises a third germ-layer, which owing to its position between the first two, is called the mesoderm, mesohlast, or middle germ-layer; this naturally can come only from the cell material of the existing germ-layers, indeed only the entoderm seems to participate in it. Two methods can he distinguished in its formation. In one the space between ectoderm and. 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 Hertwig, Richard, 1850-1937; Kingsley, J. S. (John Sterling), 1854-1929, ed. and tr. New York, H. Holt
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectzoology, bookyear1912
