The development of the human body; a manual of human embryology . g of the development of each individual,being brought about by the union of a spermatozoon withan ovum. This union constitutes what is known as thefertilization of the ovum. The fertilization of the human ovum has not yet beenobserved, but the phenomenon has been repeatedlystudied in lower forms, and a thorough study of theprocess has been made on the mouse by Sobotta, whoseobservations are taken as a basis for the following account. The maturation of the ovum is quite independent offertilization, but in many forms the penetrati
The development of the human body; a manual of human embryology . g of the development of each individual,being brought about by the union of a spermatozoon withan ovum. This union constitutes what is known as thefertilization of the ovum. The fertilization of the human ovum has not yet beenobserved, but the phenomenon has been repeatedlystudied in lower forms, and a thorough study of theprocess has been made on the mouse by Sobotta, whoseobservations are taken as a basis for the following account. The maturation of the ovum is quite independent offertilization, but in many forms the penetration of thespermatozoon into the ovum takes place before the ma-turation phenomena are completed. This is the case withthe mouse. A spermatozoon makes its way through thezona pellucida and becomes embedded in the cytoplasmof the ovum and its tail is quickly absorbed by the cyto-plasm while its nucleus and probably the middle-piecepersist as distinct structures. As soon as the maturationdivisions are completed the nucleus of the ovum, now rko -? d^mmr-^ fr * a w. tdi spk—^.-y *; * * , t * SI ,.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectembryol, bookyear1902
