germ layer theory
1germ layer theory — the theory that the embryo develops three primary germ layers, each of which gives rise to definite organ derivatives …
2theory — A reasoned explanation of known facts or phenomena that serves as a basis of investigation by which to seek the truth. SEE ALSO: hypothesis, postulate. [G. theoria, a beholding, speculation, t., fr. theoros, a beholder] adsorption t. of narcosis… …
3Caspar Friedrich Wolff — (January 18, 1733 ndash; February 22, 1794) was a German physiologist and one of the founders of embryology.LifeWolff was born in Berlin, Brandenburg. In 1759 he graduated as an M.D. from the University of Halle with his dissertation Theoria… …
4Timeline of zoology — A preliminary timeline of the history of zoology before the 1859 publication of Darwin s Origin of Species . Ancient world *28000 BC. Cave painting (e.g. Chauvet cave [http://www.culture.gouv.fr/culture/arcnat/lascaux/en/] ) in Europe, especially …
5Hertwig, Oskar — ▪ German biologist born April 21, 1849, Friedberg, Hessen died October 25, 1922, Berlin German embryologist and cytologist who was the first to recognize that the fusion of the nuclei of the sperm and ovum was the essential event in… …
6Edmund Beecher Wilson — Infobox Scientist name =Edmund Beecher Wilson image size = 150px caption = Edmund Beecher Wilson birth date = birth date|1856|10|19|mf=y birth place = Geneva, Illinois death date = death date and age|1939|3|3|1856|10|19|mf=y death place =… …
7de Beer, Sir Gavin — ▪ British zoologist born Nov. 1, 1899, London died June 21, 1972, Alfriston, Sussex, Eng. English zoologist and morphologist known for his contributions to experimental embryology, anatomy, and evolution. Concerned with analyzing… …
8Hertwig, Richard von — ▪ German biologist born September 23, 1850, Friedberg, Hessen died October 3, 1937, Munich German biologist particularly noted for the development of the germ layer theory, which proposes that all organs and tissues are derived variously from… …
9Karl Ernst von Baer — (OldStyleDate|28 February|1792|17 February OldStyleDate|28 November|1876|16 November) was a Baltic German biologist and a founding father of embryology. LifeKarl Ernst von Baer was born in Piibe manor ( de. Piep), Estonia; many of his ancestors… …
10Embryology — 1 morula, 2 blastula 1 blastula, 2 gastrula with blastopor …
