Sentence Examples


  • Of Their causes are extremely difficult to trace in detail, but it appears that they are largely due to a " shaking up " of the living matter which constitutes the fertilized germ or embryo-cell, by the process of mixture in it of the substance of two cells - the germcell and the sperm-cell - derived from two different individuals.
  • In the first place, the continued study of human population has thrown additional light on some of the questions involved, whilst the progress of microscopical research has given us a clear foundation as to the structural facts connected with the origin of the egg-cell and sperm-cell and the process of fertilization.