Die Entwickelung der Meduse ("The Development of the Medusas"), in Schleiden's Das Meer

Matthias Jakob Schleiden (April 5, 1804 - June 23, 1881) was a German botanist and co-founder of cell theory. He was born in Hamburg, Germany. Schleiden was educated at Heidelberg and practiced law in Hamburg but soon developed his hobby of botany into a full-time pursuit. Schleiden preferred to study plant structure under the microscope. While as professor of botany at the University of Jena, he wrote Contributions to Phytogenesis (1838), in which he stated that the different parts of the plant organism are composed of cells. Thus, Schleiden became the first to formulate what was then an informal belief as a principle of biology equal in importance to the atomic theory of chemistry. He also recognised the importance of the cell nucleus, discovered in 1831 by the Scottish botanist Robert Brown,^[1] and sensed its connection with cell division. Schleiden was one of the first German biologists to accept Charles Darwin's theory of evolution. He became professor of botany at the University of Tartu (then Dorpat, in what is today Estonia) in 1863. Image File history File links Schleiden. ... April 5 is the 95th day of the year in the Gregorian calendar (96th in leap years). ... 1804 was a leap year starting on Sunday (see link for calendar). ... June 23 is the 174th day of the year (175th in leap years) in the Gregorian Calendar, with 191 days remaining. ... 1881 (MDCCCLXXXI) was a common year starting on Saturday (see link for calendar). ... Botany is the scientific study of plant life. ... The cell theory is a scientific theory that is one of the foundations of biology. ... A view of the city from the castle (Schloss) The castle (Schloss) above the town Shopping district Heidelberg and the other cities of the Neckar valley View from the so called alley of philosophers (Philosophenweg) towards the Old Town, with Heidelberg Castle, Heiliggeist Church and the Old Bridge Heidelberg is... Hamburgs motto: May the posterity endeavour with dignity to conserve the freedom, which the forefathers acquired. ... Pinguicula grandiflora Botany is the scientific study of plantlife. ... A microscope (Greek: (micron) = small + (skopein) = to look at) is an instrument for viewing objects that are too small to be seen by the naked or unaided eye. ... Friedrich Schiller University of Jena (FSU) is located in Jena, Thuringia in Germany and was named for the German writer Friedrich Schiller. ... The eukaryotic cell nucleus. ... Leopold I 1831 (MDCCCXXXI) was a common year starting on Saturday (see link for calendar). ... Robert Brown (1773–1858) Robert Brown (December 21, 1773–June 10, 1858) is acknowledged as the leading British botanist to collect in Australia during the first half of the 19th century. ... This article or section does not cite its references or sources. ... For other people of the same surname, and places and things named after Charles Darwin, see Darwin. ... In 1832, while travelling on the Beagle, naturalist Charles Darwin collected giant fossils in South America. ... The University of Tartu (Estonian: Tartu Ülikool, German: Universität Dorpat) is the national university of Estonia, and the one classical university in Estonia, located in the city of Tartu. ... 1863 (MDCCCLXIII) is a common year starting on Thursday of the Gregorian calendar (or a common year starting on Saturday of the Julian calendar). ...

The standard botanical author abbreviation Schleid. is applied to species he described. In biology, binomial nomenclature is the formal method of naming species. ... In biology, a species is one of the basic units of biodiversity. ...

References

1. ^ Trisha Creekmore. The Science Channel :: 100 Greatest Discoveries: Biology. Discovery Communications. Retrieved on 2006-10-17.

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Matthias Jacob Schleiden