. The cell in development and inheritance. Cells. C D Fig. 45. — Mitosis in Actinosphcerium. [R. Hertwig.] A. Encysted form, with resting nucleus; chromatin aggregated into large nucleolus-like body. B, prophase of division of the encysted form, showing chromosome-like bodies formed of granules, and spindle without centrosomes. C. Earlier prophase of the first maturation division, sliovving extrusion of chromatic substance to form the centrosome. D. Later stage, showing centrosome and aster. occur without discoverable external cause ; and it is a very interesting fact, as Klebs, Hanscmann, and
. The cell in development and inheritance. Cells. C D Fig. 45. — Mitosis in Actinosphcerium. [R. Hertwig.] A. Encysted form, with resting nucleus; chromatin aggregated into large nucleolus-like body. B, prophase of division of the encysted form, showing chromosome-like bodies formed of granules, and spindle without centrosomes. C. Earlier prophase of the first maturation division, sliovving extrusion of chromatic substance to form the centrosome. D. Later stage, showing centrosome and aster. occur without discoverable external cause ; and it is a very interesting fact, as Klebs, Hanscmann, and Galeotti have especially pointed out, that they are of frequent occurrence in abnormal growths such as cancers and tumours. The abnormal forms of mitoses arc arranged by Hansemann in two general groups, as follows: (i) asymmetrical mitoses, in which the chromosomes are unequally distributed to the daughter-cells, and (2) nuiltipolar mitoses, in which the number of centrosomes is more than. 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, Macmillan
Size: 1544px × 1618px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectcells, bookyear1911
