Sentence Examples


  • In eggs which contain a larger quantity of food-yolk, the process by which the endoderm is enveloped by the ectoderm is somewhat different.
  • According to Heymons, the yolk-cells must be Metameric Segmentation.
  • (The ovary (a) leads into (bb) the oviduct, which is joined at (g) by the duct of the yolk-glands (h, h, Y).
  • In diameter, with little yolk, and the embryos provided with large trophic vesicles (Willey).
  • The shell is thick, and operculate in some forms; thin, and provided with filaments, in others; in the latter cases it may contain only a few yolk-granules suspended in an albumen-like substance.