. The elements of experimental embryology. Embryology, Experimental; Embryology. .X^-v.^^ -<i*;;. ,? ..-.^^•i*. I-. .;•?' Fig. 18 The labile determination of regions, o, Morula of Triton, showing the cells subsequently isolated indicated by lines. The remaining cells were destroyed with needles, their contents forming a supporting and nutritive medium sur- rounding the four living cells, b, i hour after operation, the four living cells have divided to form eight, c, g days after operation, the cells have produced a com- plicated structure, d, Section through c; nervous tissue («.), a le
. The elements of experimental embryology. Embryology, Experimental; Embryology. .X^-v.^^ -<i*;;. ,? ..-.^^•i*. I-. .;•?' Fig. 18 The labile determination of regions, o, Morula of Triton, showing the cells subsequently isolated indicated by lines. The remaining cells were destroyed with needles, their contents forming a supporting and nutritive medium sur- rounding the four living cells, b, i hour after operation, the four living cells have divided to form eight, c, g days after operation, the cells have produced a com- plicated structure, d, Section through c; nervous tissue («.), a lens (/.), muscle segments (w.) and epidermis (e.) have been differentiated. It is to be noted that no organiser was present in the explanted cells and that no gastrulation took place; the differentiations are therefore the effects of labile determinations of the cells themselves. (From Holtfreter, Arch. Entwrnech. cxxiv, 1931.) HEE. 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 Huxley, Julian, 1887-1975; De Beer, Gavin, Sir, 1899-1972. New York [Hafner Pub. Co. ]
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Keywords: ., bookcentury1900, bookcollectionbiodiversi, booksubjectembryology
