If the sperm-cell travels to the ovarium it generally takes from three to five days to make the journey. ❋ B. G. Jefferis (N/A)
Entry for these is provided by the union of the germ-cell with the male sperm-cell. 7 ❋ Ernst Lehrs (N/A)
Sir Clifford Allbutt's view, referred to in the following letter, probably had reference to the fact that the sperm-cell goes, or is carried, to the germ-cell, never vice versa. ❋ James Marchant (N/A)
It is generally known that human beings result from the union of an egg-cell and a sperm-cell, but it is not so universally understood that these germ-cells are part of a continuous stream of germ-plasm which has been in existence ever since the appearance of life on the globe, and which is destined to continue in existence as long as life remains on the globe. ❋ Paul Popenoe (1933)
In the higher animals the egg or ovum is produced by the female, and is fertilized by the sperm-cell produced by the male. ❋ Arthur Herbert Gray (1912)
From the usually annual period of flowering in plants, with its play of sperm-cell and germ-cell and consequent seed-production, through the varying sexual energies of animals, up to the monthly effervescence of the generative organism in woman, seeking not without the shedding of blood for the gratification of its reproductive function, from first to last we find unfailing evidence of the periodicity of sex. ❋ Havelock Ellis (1899)
There is no reason to suppose that the germ-cell and the sperm-cell are essentially different from each other. ❋ Havelock Ellis (1899)
In the very nature of the sperm-cell and the germ-cell we find this difference: the one attracts, gathers, draws in; the other repels, scatters, pushes out. ❋ Charlotte Perkins Gilman (1897)
Moreover, every many-celled organism reproduced in the usual way, arises from an egg-cell fertilised by a sperm-cell, and the changes involved in and preparatory to this fertilisation may make new permutations and combinations of the living items and hereditary qualities not only possible but necessary. ❋ J. Arthur Thomson (1897)
Co-existing with this, often in the same individuals, is the other method, the "sexual," by means of detached egg-cells and sperm-cells which are thrown off from the parents, and do not (except in rare instances) proceed to develop unless the egg-cell is "fertilised" by the fusion with it of a sperm-cell. ❋ Unknown (1888)
The sperm-cell has also a "nucleus," and now (as has been carefully ascertained) the nucleus of the sperm and the nucleus of the egg-cell unite and form one single nucleus. ❋ Unknown (1888)
The important conclusion is forced upon us by these experiments with a needle, that even in so typical and highly organised a creature as one of the higher or five-fingered, air-breathing vertebrates, the egg-cell does not require any material admixture from the sperm-cell in order that it may successfully germinate and develop, but only a disturbance of equilibrium, which can be administered as well by a needle's point as by a sperm-filament! ❋ Unknown (1888)
What is the precise structure of the nuclei of the cells which originate from the nucleus of the egg-cell only, and not from a nucleus formed by the fusion of that with a sperm-cell nucleus? ❋ Unknown (1888)
The permanent germ-plasm, or the active substance of the two germ-cells (egg-cell and sperm-cell), passes unchanged through a series of generations, and is not affected by environmental influences. ❋ Gustav Schwalbe (1880)
LATENT LIFE is contained in a small globule, a mere atom of matter, in the sperm-cell. ❋ Ray Vaughn Pierce (1877)
Imparting the vital principle of the sperm-cell to the germ-cell, by which a new being is created. ❋ Ray Vaughn Pierce (1877)
As has been already stated in the chapter on Biology, reproduction of the species depends upon the union of a sperm-cell with a germ-cell, the male furnishing the former and the female the latter. ❋ Ray Vaughn Pierce (1877)
So long as the vital principle remains in the sperm-cell, it lies dormant. ❋ Ray Vaughn Pierce (1877)
