. The cell; outlines of general anatomy and physiology. Cells; Anatomy; Physiology; Cells; Anatomy; Physiology. Fig. 140.—a Fertilised egg of a Sea-urchin (O. Hertwig, Eiuhrtiology, Fig. 18). The head of the spermatozoon, vs'hich has penetrated into the egg, has been converted into a sperm-nucleus (sfe) surrounded by a protoplasmic radiation, and has approached the egg- nucleus (efc). B Fertilised egg of a Sea-urchin (O. Hertwig, Emhvyology, Fig. 19). The sperm-nucleus (sfc) and the egg-nucleus (efc) have approached each other, and are both surrounded by a protoplasmic radiation. An interestin
. The cell; outlines of general anatomy and physiology. Cells; Anatomy; Physiology; Cells; Anatomy; Physiology. Fig. 140.—a Fertilised egg of a Sea-urchin (O. Hertwig, Eiuhrtiology, Fig. 18). The head of the spermatozoon, vs'hich has penetrated into the egg, has been converted into a sperm-nucleus (sfe) surrounded by a protoplasmic radiation, and has approached the egg- nucleus (efc). B Fertilised egg of a Sea-urchin (O. Hertwig, Emhvyology, Fig. 19). The sperm-nucleus (sfc) and the egg-nucleus (efc) have approached each other, and are both surrounded by a protoplasmic radiation. An interesting phenomenon now commences to attract attention (Fig. 140 A, B). The egg- and sperm-nuclei (male and female pro-nuolei) mutually attract each other, as it were simultaneously, and travel through the yolk towards each other with increasing velocity; the sperm-nucleus (sk) with its radiation containing the centrosome always moving in front of it, travels more quickly than the egg-nucleus (ek) with its ovo-centrum. Soon they. 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 Hertwig, Oscar, 1849-1922; Campbell, M. , tr; Campbell, Henry Johnstone, 1859- ed. London, S. Sonnenschein & Co. ; New York, Macmillan & Co.
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