Hertwig, Oskar

Hertwig, 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 fertilization.

      After studying medicine and zoology at Jena, Zürich, and Bonn, he obtained a lectureship in anatomy at the University of Jena (1875) and was elected to a professorship there (1881). From 1888 to 1921 he was professor of anatomy and evolutionary history at the University of Berlin and director of the Anatomisch-Biologische Institut.

      Among his important investigations were studies of nuclear transmittal of hereditary characters, biogenetic theory, and the effect of radium rays on somatic and germ cells. With his brother, Richard von Hertwig, he investigated the formation of the coelom (body cavity) in multicellular animals and wrote several papers on the germ-layer theory, questioning the proposition that all organs and tissues derive variously from three basic tissue layers.

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Universalium. 2010.

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  • Hertwig, Oskar — ► (1849 1922) Anatomista y embriólogo alemán. Él y su hermano Richard fueron los primeros en descubrir y observar con éxito la fecundación, empleando huevos y espermatozoides de erizos de mar …   Enciclopedia Universal

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  • Hertwig — Hertwig, Oskar, Anatom, geb. 21. April 1849 in Friedberg (Wetterau), Prof. in Jena, seit 1888 in Berlin; schrieb: »Beiträge zur Kenntnis der Bildung, Befruchtung und Teilung des tierischen Eies« (1875 u. 1878), »Lehrbuch der… …   Kleines Konversations-Lexikon

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  • Oskar Hertwig — Oscar Hertwig Portrait d Oscar Hertwig Oscar Hertwig, né le 21 avril 1849 à Friedberg et mort le 25 octobre 1922 à Berlin, est un embryologiste allemand. Il étudia la médecine …   Wikipédia en Français

  • Hertwig, 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… …   Universalium

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  • Richard Hertwig — Richard Wilhelm Karl Theodor Ritter von Hertwig (September 23, 1850 October 3, 1937), also Richard Hertwig or Richard von Hertwig, was a German zoologist and professor of 50 years, notable as the first to describe zygote formation as the fusing… …   Wikipedia

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