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- W112229659 abstract "Embryology, the science of development, has like all other sciences its own embryology. How and when it was conceived remains unknown. Those very early days have been well described by the founder of chemical embryology, Joseph Needham, a gifted historian as well as a biochemist and embryologist. After man discovered artificial incubation of hen’s eggs, which was used already in the oldest civilizations for very practical purposes, he must have had sufficient curiosity to break the shell immediately and look at the developing chick embryo. Without knowing it, he became a “descriptive embryologist” and studied morphogenesis (the appearance of new forms and functions). When he made the same kind of observations on a duck embryo, he became a “comparative embryologist”. The first known descriptive and comparative embryologist was Aristoteles, who, more than 20 centuries ago, described the development of chick embryos and compared this development with that of embryos from fishes, reptiles, etc. Descriptive and comparative embryology remain at the root of modern embryology. These two branches of embryology, which grew so successfully in the eighteenth and nineteenth centuries, may now seem old; but they are by no means dead, especially in view of the continuous progress made in the optical means of observation. Thanks to the advent of electron microscopy, numerous and valuable papers have been published describing the ultrafine structure of normal sea urchin, frog or chicken embryos. This is the modern form of descriptive and comparative embryology.KeywordsDuck EmbryoDevelop Chick EmbryoComparative EmbryologyUltrafine StructureUrchin Paracentrotus LividusThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves." @default.
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- W112229659 date "1986-01-01" @default.
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- W112229659 title "From Descriptive to Molecular Embryology" @default.
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- W112229659 doi "https://doi.org/10.1007/978-3-642-82883-6_1" @default.
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