. The cell in development and inheritance. Cells. H C. 1 Fig. 3. — Cleavage of the ovum of the sea-urchin Toxopneusles, X 330, from hfe. The suc- cessive divisions up t'o the i6-cell stage {H) occupy about two hours. / is a section of the embryo (blastula) of three hours, consisting of approximately 128 cells surrounding a central cavity or blastocoel. celbila e cellular^ At the present day this conclusion rests upon a foundation so firm that we are justified in regarding it as a universal law of development. Now, if the cells of the body always arise by the division of pre- existing cells, al
. The cell in development and inheritance. Cells. H C. 1 Fig. 3. — Cleavage of the ovum of the sea-urchin Toxopneusles, X 330, from hfe. The suc- cessive divisions up t'o the i6-cell stage {H) occupy about two hours. / is a section of the embryo (blastula) of three hours, consisting of approximately 128 cells surrounding a central cavity or blastocoel. celbila e cellular^ At the present day this conclusion rests upon a foundation so firm that we are justified in regarding it as a universal law of development. Now, if the cells of the body always arise by the division of pre- existing cells, all must be traceable back to the fertilized egg-cell as 1 Arch, filr Path. Ana/., VIII., p. 23, 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 Wilson, Edmund B. (Edmund Beecher), 1856-1939. New York : The Macmillan company
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectcells, bookyear1896
