The cell theory scientists were Theodor Schwann and Matthias Jakob Schleiden. Schleiden suggested that all the different parts of plants are made of cells. Schwann came to the same conclusion as Schleiden and stated further that animals were also composed of cells.Continue Reading
Schleiden further suggested that cells were made by a crystallization process either within other cells or from the outside. However, this theory was later refuted by scientists Rudolf Virchow, Robert Remak and Albert von Kölliker.
Nevertheless, Rudolf Virchow later made contributions to Schleiden’s and Schwann’s work. He proposed that living cells must develop from pre-existing cells. However, this idea had already been proposed by Robert Remak, who further published observations on cell division disapproving Schwann’s and Schleiden’s generation schemes. Remak stated that binary fission was how new animal cells were made. No further contributions were made on cell theory.
The modern interpretation of cell theory states:
Theodor Schwann was a German physiologist widely credited for establishing the cell as the fundamental unit of animal structure, helping in the development of cell theory in the process. His other accomplishments included coining the term metabolism, discovering the digestive enzyme pepsin, founding modern histology, classifying yeast as an organic substance and determining that embryonic cells form the basis of all adult animal tissues. He lived to be 72 years old, from 1810 to 1882.Full Answer >
The modern cell theory states that living organisms are made of cells, that all cells come from other cells and that cells are the most basic life form. As scientific advancements are made, definitions of theories, like the cell theory, are updated. The modern cell theory is not the same as cell theory of the past.Full Answer >
Felix Dujardin made his largest contribution to cell theory when he proposed the classification of a new type of single-celled organism which he called rhizopoda. Felix Dujadin's rhizopoda are now known as protozoans.Full Answer >
Robert Brown contributed to cell theory by showing the radical motion of molecules within a cell under the light of a microscope. The Brownian method was named after Brown's discovery of the way that the molecules moved.Full Answer >