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Discovered the mammalian ovum
- K arl Ernst von Baer was an Estonian biologist who discovered the mammalian ovum—the reproductive egg in female mammals. He made significant contributions to the study of the embryonic development of animals.
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Jun 11, 2018 · Karl Ernst von Baer. 1792-1876. Estonian Biologist. Karl Ernst von Baer was an Estonian biologist who discovered the mammalian ovum—the reproductive egg in female mammals. He made significant contributions to the study of the embryonic development of animals.
In 1828, the Estonian-born embryologist Karl von Baer launched a withering attack on recapitulation. A careful look at embryos revealed that it was impossible to arrange them in any meaningful series. From the earliest stages, vertebrates all share an anatomy that invertebrates such as insects or worms never acquire.
As a contribution to the developing history of evo-devo, I present here a previously unknown and quite prescient view about develop-ment and evolution advanced by Karl Ernst von Baer (1792-1876) in the early 19th century.
Karl Ernst, knight von Baer, (born Feb. 29, 1792, Piep, Est., Russian Empire—died Nov. 28, 1876, Dorpat, Est.), Prussian-born Estonian embryologist. Studying chick development with Christian Pander (1794–1865), Baer expanded Pander’s concept of germ layer formation to all vertebrates, thereby laying the foundation for comparative embryology.
Dec 1, 2013 · Karl Ernst von Baer (1792–1876), a brilliant 19th-century zoologist, embryologist, and explorer (A). Detailed drawing of chicken embryonic development by von Baer and Heinz Christian Pander (B) showing tissue origins and cell movements, which led to the discovery of the three germ layers [1].
- Arhat Abzhanov
- 2013
May 15, 2024 · In this section, I will present some core ideas about Karl Ernst von Baer’s view of teleological development. As mentioned in the introduction, there are several reasons for introducing this historical contribution. One of them is that Baer has a direct influence on the work of Uexküll (Tamm & Kull, 2016), as we will see in a moment. Another ...
Nov 22, 2021 · Article 18 May 2024. Article 27 July 2014. Karl Ernst von Baer proposes a principle of developmental transformation—“ The more special develops from a more general type ” (von Baer 1828, 140 in Oppenheimer, 1967, 297)—that has distinctive explanatory properties.
