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The Cell Theory

The Cell Theory. Microscopes Provide the Windows to the World of the Cell. The Men. Anton Van Leeuwenhoek (1600’s) Credit for the first microscope Looked at pond water and saw “wee beasties”. Robert Hooke. Observed plant stems, wood, and cork (1600’s)

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The Cell Theory

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  1. The Cell Theory Microscopes Provide the Windows to the World of the Cell

  2. The Men • Anton Van Leeuwenhoek (1600’s) • Credit for the first microscope • Looked at pond water and saw “wee beasties”

  3. Robert Hooke • Observed plant stems, wood, and cork (1600’s) • Saw all the tiny chambers and called them CELLS • What cell part did Hooke observe? • Cell Wall

  4. Robert Brown (1833) • Observed that cells had a dark structure within plant cells • Brown observed the nucleus

  5. Matthias Schleiden (1838) • Stated that all plants are made of Cells • Made many observations of plants around the area

  6. Theodor Schwann (1839) • Stated that all animals are made of Cells • Observed many animal tissues

  7. Rudolf Virchow (1855) • Stated that all cells come from pre-existing cells • Cells arise from the division of pre-existing cells

  8. The Cell Theory • All living things are composed of cells • Cells are the basic unit of structure and function in living things • All cells come from pre-existing cells

  9. Exceptions to the Cell Theory • Viruses – are not cellular • Mitochondria and chloroplast – each contain genetic material and can reproduce

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