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  • differentiation
  • 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)
  • tissues
  • James Murphy (1914) found that rat tissues that could not grow in adult chickens survived in the developing chick. (wikipedia.org)
  • model organism
  • The relatively large size of the chick as a model organism allowed scientists during this time to make these significant observations without the help of a microscope. (wikipedia.org)
  • tissue
  • Distinct tissue areas were recognized that grew and gave rise to specific structures, including the blastoderm, or chick origin. (wikipedia.org)
  • 18th
  • Expanding use of the microscope coupled with a new technique in the late 18th century unveiled the developing chick for close-up examination. (wikipedia.org)