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4-1 The History of Cell Biology The Discovery of Cells Cell – the smallest unit of life that can carryout all of the processes of life The Discovery of Cells Robert Hooke The Discovery of Cells Robert Hooke English Scientist The Discovery of Cells Robert Hooke English Scientist 1665 – first person to see cells looked at cork under a microscope and saw little boxes; called them “Cells” The Discovery of Cells Anton van Leeuwenhoek The Discovery of Cells Anton van Leeuwenhoek Dutch trader; made microscopes The Discovery of Cells Anton van Leeuwenhoek Dutch trader; made microscopes 1673 – saw first living organisms in pond water; called them “animalcules” The Discovery of Cells Matthias Schleiden The Discovery of Cells Matthias Schleiden German Botanist The Discovery of Cells Matthias Schleiden German Botanist 1838 – first to say all plants are composed of cells The Discovery of Cells Theodor Schwann The Discovery of Cells Theodor Schwann German zoologist The Discovery of Cells Theodor Schwann German zoologist 1839 – first to say all animals composed of cells The Discovery of Cells Rudolf Virchow The Discovery of Cells Rudolf Virchow German physician The Discovery of Cells Rudolf Virchow German physician 1855 – first to say Cells come from other cells The Discovery of Cells The Cell Theory The Discovery of Cells The Cell Theory 1. All organisms are made of cells The Discovery of Cells The Cell Theory 1. All organisms are made of cells 2. Cells are the most basic unit of life The Discovery of Cells The Cell Theory 1. All organisms are made of cells 2. Cells are the most basic unit of life 3. Cells come only from other living cells The Discovery of Cells The Cell Theory 1. All organisms are made of cells 2. Cells are the most basic unit of life 3. Cells come only from other living cells (Schleiden, Schwann, and Virchow) The Discovery of Cells Theory - a well-substantiated explanation of some aspect of the natural world that is acquired through the scientific method and repeatedly tested and confirmed through observation and experimentation.