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Theodor Schwann (German pronunciation: [ˈteːodoːɐ̯ ˈʃvan]; 7 December 1810 – 11 January 1882) was a German physician and physiologist. His most significant contribution to biology is considered to be the extension of cell theory to animals.
- Copley Medal (1845)
Oct 19, 2023 · The classical cell theory was proposed by Theodor Schwann in 1839. There are three parts to this theory. The first part states that all organisms are made of cells. The second part states that cells are the basic units of life.
Cell theory, fundamental scientific theory of biology according to which cells are held to be the basic units of all living tissues. First proposed by German scientists Theodor Schwann and Matthias Jakob Schleiden in 1838, the theory that all plants and animals are made up of cells marked a great.
- Muscle tissue. Some of Schwann's earliest work in 1835 involved muscle contraction, which he saw as a starting point for "the introduction of calculation to physiology".
- Pepsin. In 1835, relatively little was known about digestive processes. William Prout had reported in 1824 that the digestive juices of animals contained hydrochloric acid.
- Yeast, fermentation, and spontaneous generation. Next Schwann studied yeast and fermentation. His work on yeast was independent of work done by Charles Cagniard de la Tour and Friedrich Traugott Kützing, all of whom published work in 1837.
- Cell theory. In 1837, Matthias Jakob Schleiden viewed and stated that new plant cells formed from the nuclei of old plant cells. Dining with Schwann one day, their conversation turned on the nuclei of plant and animal cells.
The conclusions of Schleiden and Schwann are considered to represent the official formulation of 'cell theory' and their names are almost as closely linked to cell theory as are those of Watson...
- Paolo Mazzarello
- mazzarello@igbe.pv.cnr.it
- 1999
Jun 2, 2021 · Michał K. Owecki. 2455 Accesses. 1 Citation. Explore all metrics. Theodor Schwann (Fig. 1 ), the eminent founder of modern histology and the discoverer of the lemmocyte, was born on December 7, 1810 in Neuss, Germany, the fourth son of Elisabeth (née Rottels) and Leonard Schwann, the owner of a local bookstore.
The cell was first discovered by Robert Hooke in 1665 using a microscope. The first cell theory is credited to the work of Theodor Schwann and Matthias Jakob Schleiden in the 1830s. In this theory the internal contents of cells were called protoplasm and described as a jelly-like substance, sometimes called living jelly.
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