. The physiology of reproduction. Reproduction. Fig. 50.—Successive stages in the fertilisation of an ovum of Eolivnus esciderUus, showing the entrance of the spermatozoon. (From Bryce.) Cytoplasmic filaments arrange themselves around the centro- some in the form of a star, the sperm-aster, which accompanies the male pronucleus, and afterwards comes to he alongside of > Boveri, Zellen Stiidien IV., Ueber die Natur der Centrosomen, Jena, 1901. Jenkinson, " Observations on the Maturation and Fertilisation of the Egg of the Axolotl," Qtiar. Jour. Micr. Science, vol. xlviii., 1904, ha
. The physiology of reproduction. Reproduction. Fig. 50.—Successive stages in the fertilisation of an ovum of Eolivnus esciderUus, showing the entrance of the spermatozoon. (From Bryce.) Cytoplasmic filaments arrange themselves around the centro- some in the form of a star, the sperm-aster, which accompanies the male pronucleus, and afterwards comes to he alongside of > Boveri, Zellen Stiidien IV., Ueber die Natur der Centrosomen, Jena, 1901. Jenkinson, " Observations on the Maturation and Fertilisation of the Egg of the Axolotl," Qtiar. Jour. Micr. Science, vol. xlviii., 1904, has re- cently stated that the middle-piece of the spermatozoon, after forming the centre of the sperm-sphere and sperm-aster, completely disappears, and that the centrosome is formed from the sperm-nuolens at a later stage. (The sperm-sphere is the clear area which forms in the ovum round the head and middle-piece of the spermatozoon shortly after its entrance.). 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 Marshall, F. H. A. (Francis Hugh Adam), 1878-1949; Cramer, William, 1878-1945; Lochhead, James. London, New York, Longmans, Green
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectreproduction, bookyea
