Unformatted text preview: monastery, known as cells. He therefore referred to the units as cells. Later in that century, Anton Van Leeuwenhoek, a Dutch merchant, made further observations of plant, animal, and microorganism cells. In 1838, the German botanist Matthias Schleiden proposed that all plants are composed of cells. A year later, his colleague, the anatomist Theodore Schwann, concluded that all animals are also composed of cells. In 1858, the biologist Rudolf Virchow proposed that all living things are made of cells and that all cells arise from preexisting cells. These premises have come down to us as the cell theory....
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- Fall '07
- Biology, Anton van Leeuwenhoek, German botanist matthias, anatomist Theodore Schwann, Englishman Robert Hooke., biologist Rudolf Virchow