General physiology; an outline of the science of life . Pig. 79.—Reducing division in the origin of the sperm-cell from the sperm mother-cell of thethread-worm of the horse. (After O. Hertwig.) These comprise the various forms of cell-division which havebecome known thus far. The only element common to them allis the transfer of both nuclear substance and protoplasm to thedaughter-cells. 3. Fertilisation The act of fertilisation is intimately associated with that pro-found mystery with which mankind is wont to invest its mostsacred feelings. The biologist recognises that fact that the un-consc
General physiology; an outline of the science of life . Pig. 79.—Reducing division in the origin of the sperm-cell from the sperm mother-cell of thethread-worm of the horse. (After O. Hertwig.) These comprise the various forms of cell-division which havebecome known thus far. The only element common to them allis the transfer of both nuclear substance and protoplasm to thedaughter-cells. 3. Fertilisation The act of fertilisation is intimately associated with that pro-found mystery with which mankind is wont to invest its mostsacred feelings. The biologist recognises that fact that the un-conscious aim of normal sexual love, one of the most powerfulfactors that control organic life, is the microscopic act of fertilisa-tion of the female egg-cell by the male sperm-cell. At first sightit might seem strange that so powerful motives, as are those oflove in human life, culminate in so tiny a phenomenon, whichcannot be perceived by the naked eye; but when it is borne inmind what the result of this act is, what an endless chain of com-plex proce
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Keywords: ., bookcentury1800, bookdecade1890, bookidgen, booksubjectphysiology
