. A text-book of comparative physiology for students and practitioners of comparative (veterinary) medicine. Physiology, Comparative. REPRODUCTION. 63 of the male cell. Once more we are led to see the importance of this structure in the life of the cell. Fertilization of the Ovum.—The spermatozoon, lashing its way along, when it meets the ovum, enters it either through a special minute gateway (micropyle), or, if this be not present- as it is not in the ova of all animals—actually penetrates the membranes and substance of the female cell, and continues act- ive till the female pronucleus is re
. A text-book of comparative physiology for students and practitioners of comparative (veterinary) medicine. Physiology, Comparative. REPRODUCTION. 63 of the male cell. Once more we are led to see the importance of this structure in the life of the cell. Fertilization of the Ovum.—The spermatozoon, lashing its way along, when it meets the ovum, enters it either through a special minute gateway (micropyle), or, if this be not present- as it is not in the ova of all animals—actually penetrates the membranes and substance of the female cell, and continues act- ive till the female pronucleus is reached, when the head enters and the tail is absorbed or blends with the female cell. The nu- cleus of the male cell prior to union with the nucleus of the. 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 Mills, Wesley, 1847-1915. New York, Appleton
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