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Matthias Jakob Schleiden
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Matthias Jakob Schleiden (April 5, 1814 - June 23, 1881) was a German botanist and co-founder of the 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 a professor of botany at the University of Jena, he wrote
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Matthias Jakob Schleiden ( April 5 , 1804 - June 23 , 1881 ) was a German botanist and co-founder of the 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 , 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 ... recognised the importance of the cell nucleus , discovered in 1831 by the Scottish botanist Robert Brown , 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 .
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In 1839 Theodor Schwann and Matthias Jakob Schleiden formulated (created) what is called the cell theory. The cell theory states that all living things are made up of one or more cells. An organism, which is another word for a living thing, that is made up of one cell is unicellular. Different forms of bacteria such as the amoeba are unicellular. An organism that is made up of more then one cell is multi-cellular. Humans, other mammals, birds, reptiles, plants, and many other organisms are multi-cellular.
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In 1838, the botanist Matthias Jakob Schleiden and the physiologist Theodor Schwann discovered that both plant cells and animal cells had nuclei. Based on their observations, the two scientists conceived of the hypothesis that all living things were composed of cells. In 1839, Schwann published 'Microscopic Investigations on the Accordance in the Structure and Growth of Plants and Animals', which contained the first statement of their joint cell theory.
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The botanist Matthias Jakob Schleiden was born in Hamburg, Germany on April 5th 1804. Schleiden studied law at Heidelberg and practiced as a legal advocate in Hamburg, Germany until 1831. Having had little success in this career, he began studying botany and medicine at Gottingen and Berlin, and in 1839 graduated from Jena, where he was appointed extraordinary professor of botany from 1839-1862. In 1863, Schleiden was called to Dorpat, Estonia, but resigned the following year and returned to Germany, where he lived as a private teacher.
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Matthias Jakob Schleiden: „Schelling's und Hegel's Verhältnis zur Naturwissenschaft. Zum Verhältnis der physikalistischen Naturwissenschaft zur spekulativen Naturphilosophie“, hrsg. u. erläutert von Olaf Breidbach, unpaginiert, VCH, Acta humaniora, Weinheim 1988, in: Philosophischer Literaturanzeiger 42/4 (1989), 551-554.
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Matthias Jakob Schleiden