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Cell Theory and Cell Study

Understand the Cell Theory, including its basic principles and exceptions, through a historical journey of cell study from early microscopes to modern discoveries.

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Cell Theory and Cell Study

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  1. Cell Theory and Cell Study

  2. The Cell Theory • The cell is the basic unit ofstructure of all living things. • All living things are made up of cells. • The cell is the basic unit offunction of all living things. • Cells come from pre-existing cells.

  3. Exceptions to the Cell Theory • These are facts that can not be explained by the Cell Theory. • Viruses are not made up of cells, but they do contain genetic material. • The first cell could not have arisen from a previously existing cell, Scientists don’t know the origin of the first cell.

  4. History of Cell Study • Scientists did not know much about cells until the discovery of the microscope. • Cells are so small they can not be seen w/o a microscope. • Anton van Leeuwenhoek- Dutch naturalist (1600’s). Developed the first microscope. • Robert Hooke- English (1665) was the first to develop a compound microscope. He came up with the term cell.

  5. History cont….. • Robert Brown- (1831) discovered the nucleus of the cell. • Matthias Schleiden- (German, around 1830’s) a Botanist, concluded that all plants were made up of cells. • Theodor Schwann- (German, worked during the same time as Schleiden), studied animal cells. Concluded that animals were made up of cells. • Rudolf Virchow- (1858) concluded that all new cells must come from previously existing cells.

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