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The Cell Theory and Parts of a Cell

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Chapter 7 Study Guide Section 7.1- The Discovery of Cells The History of the Cell Theory Before microscopes: people thought diseases were caused by curses and supernatural spirits. Microscopes enabled scientists to view and study cells, the basic unit of life. -Light Microscopes Anton van Leeuwenhoek (1600s): used a SIMPLE LIGHT MICROSCOPE (1 lens and uses light to view objects). English scientist Robert Hooke (same time as Anton Van Leeuwenhoek): used a compound light microscope to study cork (dead cells in oak bark). He observed cells. COMPOUND LIGHT MICROSCOPE: uses a series of lenses to magnify in steps up to 1500x. German scientist Matthias Schleiden (1830s): all plants are composed of cells. German scientist Theodor Schwann: all animals are made of cells. CELL THEORY:

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