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Comparative embryology is the branch of embryology that compares and contrasts embryos of different species, showing how all animals are related. History
The theory of recapitulation, also called the biogenetic law or embryological parallelism—often expressed using Ernst Haeckel's phrase "ontogeny recapitulates phylogeny"—is a historical hypothesis that the development of the embryo of an animal, from fertilization to gestation or hatching (), goes through stages resembling or representing successive adult stages in the evolution of the ...
Evolutionary embryology is the expansion of comparative embryology by the ideas of Charles Darwin. Similarly to Karl Ernst von Baer 's principles that explained why many species often appear similar to one another in early developmental stages, Darwin argued that the relationship between groups can be determined based upon common embryonic and ...
This was a theory that attempted to provide a link between comparative embryology and a "pattern of unification" in the organic world. It was based on a belief that within the entire animal kingdom there was a single unified body-type, and that during development, the organs of higher animals matched the forms of comparable organs in lower animals.
In and around 1800, embryology fused with comparative anatomy as the primary foundation of morphology. [3] Ernst Haeckel, along with Karl von Baer and Wilhelm His, are primarily influential in forming the preliminary foundations of 'phylogenetic embryology' based on principles of evolution. [4]
Comparative vertebrate embryology. The embryonic disc becomes oval and then pear-shaped, the wider end being directed forward. Towards the narrow, posterior end, an opaque primitive streak , is formed and extends along the middle of the disc for about half of its length; at the anterior end of the streak there is a knob-like thickening termed ...
Eugen Korschelt (28 September 1858, in Zittau – 28 December 1946, in Marburg) was a German zoologist.He is known for his research in the field of comparative embryology and his work involving biological regeneration and transplantation.
The institute was founded by A. A. W. Hubrecht in 1911 as "a selective society of embryologists who would meet and discuss aspects of comparative embryology". [2] After Hubrecht's death in 1915, the first director was Daniel de Lange ; [ 2 ] other former presidents have included Etienne Wolf , Lauri Saxén (1973–77), [ 3 ] Edward M. De ...