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1 they discovered stuff about animals

2 microscope

The cell theory states that 1. cells are the unit of structure of all living things 2. cells are the unit of function of living things--they carry out life processes 3. all cells come from pre--existing cells.Jul 17, 2012

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rudolph virchow

1855 Rudolph Virchow stated that all living things come from other living things

hans and zacharias janssen

anton van leeuwenhoek

robert hooke

matthias schleiden

1595 Hans and Zacharias Janssen produced the first compound microscope by combining two convex lenses within a tube

1665 Robert Hooke discovered the cellular composition of cork and introduced the word cell to science

1674 Anton van Leeuwenhoek improved magnification of microscopes by polishing lenses

1676 Anton van Leeuwenhoek "animacules" were discovered

1683 Anton van Leeuwenhoek discovered bacteria from a sample of saliva from his mouth

theodor schwann

1838 Matthias Schleiden discovered the plants were made up of cells

1839 Theodor Schwann discovered that animals were made up of cells

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