Biology - Cell theory 2

Biology - Cell theory 2

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  • They observed a wide variety of cell shapes, and they observed cells dividing. Scientists began to ask important questions.
  • Is all living matter made of cells? 
  • Where do cells come from?
  • Matthias Schleiden
  • In 1838, Matthias Schleiden proposed that plants are made of cells. Sametime, Theodor Schwann concluded that all animals are made of cells. Schwann reached the mail about his work to other scientists with Schleiden, who got back to him, and they started working on the beginning of the cell theory
  • Theodor Schwann
  •  In 1839, they published the first statement of the cell theory, concluding that all living things are made of cells and cell products. This theory helped lay the groundwork for all biological research that followed.
  • Schwann stated in his publication that cells form spontaneously by free-cell formation. But, Rudolf Virchow reported that all cells come from preexisting cells.
  • Rudolf Virchow
  • Cell theory •  All organisms are made of cells. •  All existing cells are produced by other living cells. •  The cell is the most basic unit of life. 
  • Almost all cells are too small to see without the aid of a microscope. But Today we know that cells are the smallest unit of living matter that can carry out all processes required for life.
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