Meet the Scientists Developing the Cell Theory. What is a cell? The cell is a basic building block of living things, both plant and animal.

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Meet the Scientists Developing the Cell Theory

What is a cell? The cell is a basic building block of living things, both plant and animal.

Cell Theory All living things are made up of cells. Cells are the smallest working units of all living things. All cells come from preexisting cells through cell division.

Tool used to view cells

All living things have cells. PlantsAnimals

Timeline Hans and Zacharias Janssen (1590), Dutch lens grinders, father and son. Produced first compound microscope (2 lenses).

Timeline Robert Hooke (1665), English Scientist, looked at a thin slice of cork through a compound microscope and observed tiny, hollow room like structures. He called them cells, but only saw the outer cell walls because the cork cells were not alive.

Timeline-1680 Anton van Leeuwenhook (1680), Dutch Amateur Scientist, looked at blood, rain water and scrapings from teeth through a simple microscope. He called these bacteria, animalcules. Bacteria are Prokaryotic Leeuwenhook ???

Timeline-1838 Matthias Schleiden (1838), German Botanist, viewed plant parts under a microscope and discovered that they are made of cells. Plants are Eukaryotic

Timeline-1839 Theodor Schwann (1839), German Zoologist, viewed animals parts under a microscope and discovered that they are made of cells. Animals are Eukaryotic.

Timeline Rudolph Virchow (1855), German Physician, stated that living cells come only from other living cells. Animal Cells Plant Cells