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CELL THEORY

CELL THEORY. History of the Cell Theory. Robert Hooke 1665: used a simple microscope to look at cork Observed small boxes Called them CELLULAE: Latin word for small rooms CELL- the basic unit of structure for all living things Figure 7.2 in book. History of the Cell Theory.

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CELL THEORY

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  1. CELL THEORY

  2. History of the Cell Theory • Robert Hooke • 1665: used a simple microscope to look at cork • Observed small boxes • Called them CELLULAE: Latin wordfor small rooms • CELL- the basic unit of structure for all living things • Figure 7.2 in book

  3. History of the Cell Theory • Anton van Leewenhoek • Late 1600s: designed his own microscope • Saw living things in pond water, milk and other substances

  4. History of the Cell Theory • 1830s-1855 • Nucleus is discovered • A theory is proposed that all plants and animals are made of cells • 1880-1890 • Louis Pasteur and Robert Koch study bacteria

  5. CELL THEORY • Schleiden (German), Schwann (German) and Virchow (Prussian) all came up with parts of the cell theory • Schleiden studied plants and determined all plants are made of cells • Schwann studied animal tissues and determined they are composed of cells • Virchow theorized all cells come from other cells

  6. CELL THEORY • All living things are composed of cells • Cells are the basic unit of structure and organization for all living things • Cells come from pre-existing cells

  7. Prokaryotic Cells • Have NO nucleus • Simple cells • Mainly bacteria • PRO = NO

  8. Eukaryotic Cells • Has a true nucleus • Complex cells • Majority of organisms • EU = NUcleus

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