. The development of the frog's egg; an introduction to experimental embryology. Embryology. 1 ^ r. D o F Fig. 11.—Extrusion of first polar body and fertilization of egg of Toad. (From preparations made by Helen D. King.) A. First polar spindle. B. First polar body extruded; second jjolar spindle present. C. Entrance of spermatozoon. D. Male and female pronuclei. E. Apposition of two pronuclei. F. First seg- mentation-spindle. point of the surface of the Qgg. This protrusion of protoplasm with its enclosed half of the nucleus gradually pinches off from the surface of the egg, and there is t

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. The development of the frog's egg; an introduction to experimental embryology. Embryology. 1 ^ r. D o F Fig. 11.—Extrusion of first polar body and fertilization of egg of Toad. (From preparations made by Helen D. King.) A. First polar spindle. B. First polar body extruded; second jjolar spindle present. C. Entrance of spermatozoon. D. Male and female pronuclei. E. Apposition of two pronuclei. F. First seg- mentation-spindle. point of the surface of the Qgg. This protrusion of protoplasm with its enclosed half of the nucleus gradually pinches off from the surface of the egg, and there is thus formed the first polar body (Fig. 11, B). The egg gets a thin layer of gelatinous. 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 Morgan, Thomas Hunt, 1866-1945. New York, The Macmillan company; [etc. , etc. ]

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Keywords: ., bookcentury1800, bookdecade1890, booksubjectembryology, bookyear1