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In 1805 Lorenz Oken made several statements that together make up the cell theory. Here are the four parts of the cell theory: 1) All living things are made of cells. 2) Cells are alike in structure and function. 3) Cells need information in order to survive. 4) New cells come from old cells. Why are cells so small? The cell theory never states ...
- Johannes Peter Müller
- Theodor Schwann
- Carl Rokitansky
- Rudolf Virchow
Johannes Peter Müller, who has become one of the most distinguished physiologists of Germany, was born in Koblenz into a shoemaker’s family on July 14, 1801. Educated in the faith of the Catholic Church, he entered a Latin seminary of the Jesuits. At first, Müller wanted to start a life path as a Roman Catholic priest. Nevertheless, he got interest...
Schwann was born in Neuss on the Rhine, a few miles from Cologne. He received an excellent training in mathematics and physics at the Jesuits College and started to study medicine in 1829. Schwann received his MD in 1834 in Berlin and learned anatomy, physiology, and general pathology from Johannes Müller (1801–1858). During these years spent under...
Rokitansky (Fig. 2) was one of the towering figures in the history of pathological anatomy. Karl Freiherr von Rokitansky was born on February 19, 1804, in Königgrätz (today Hradec Králové, Bohemia, Czech Republic) and died on July, 23, 1878, in Vienna, Austria. He studied in Prague and Vienna and started his career in the morgue of the Allgemeine K...
Rudolf Carl Virchow (Fig. 3) was born 1821 in Schivelbein (Pomerania, Prussia; now Świdwin, Poland) and moved up to be one of the most prominent pathologists and physicians of the 19th century. He pioneered the modern concept of diagnostic pathology and created the modern scientific paradigm by its application of cell theory to explain the effects ...
- Roland Sedivy
- roland@sedivy.net
- 2020
In 1855, German physician who concluded that new cells could be porduced only from the division of existing cells, comnfirming a suggestion made by German Lorenz Oken 50 years earlier Rudolf Virchow In 1838, German botanist who concluded that all plants are made of cells
Mar 2, 2018 · This idea stimulated the concept of German philosopher Lorenz Oken (1779–1851) that all organisms are composed of “infusoria” and “Urbläschen” (primordial bubbles) as basic life units; this speculation directly preceded the works of the first empirical cell biologists (Canguilhem 2008; Harris 2000 ).
- Juraj Sekeres, Juraj Sekeres, Viktor Zarsky, Viktor Zarsky
- 2018
His general ideas about the elemental structures of living organisms, though specifically incorrect, anticipated the subsequent identification of the cell and development of cell theory. He was also a founder of scientific congresses or meetings.
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B.The process of cell division is preceded by the division of chromosomes C.Cells form by first depositing the cytoblast/ nucleus and then different material around it D.The cytoplasm forms first, and the cytoblast/ nucleus only later forms within it 11 Cell Theory •Schwann’s claim: cells are the fundamental units of living organisms
