• differentiation
  • These findings support the concept that calcitonin secretion within the progesterone-primed uterus and the coordinate expression of CR-1a by preimplantation embryos regulates blastocyst differentiation through receptor-mediated Ca2+ signaling. (biologists.org)
  • European scientists, including Ulisse Aldrovandi, Volcher Cotier and William Harvey, used the chick to demonstrate tissue differentiation, disproving the widely held belief of the time that organisms are "preformed" in their adult version and only grow larger during development. (wikipedia.org)
  • Tissue
  • Distinct tissue areas were recognized that grew and gave rise to specific structures, including the blastoderm, or chick origin. (wikipedia.org)
  • Since the immune system of the chick is not functional until about day 14 of incubation, foreign tissue can grow. (wikipedia.org)
  • found
  • Among 1500 fertilised eggs used to examine the primordial germ cells in 2-day and 5.5-day chick embryos Gallus gallus domesticus , bicephalia was found and the condition of the heads, the heart and other parts of the body was fully described. (bmj.com)
  • James Murphy (1914) found that rat tissues that could not grow in adult chickens survived in the developing chick. (wikipedia.org)