The Cell Theory states that (1) all living things are made of cells, (2) cells are the basic units of structure and function in living things, and (3) all cells come from other cells. This theory was developed from the scientific discoveries of several scientists between 1663-1855, including Hooke, Leeuwenhoek, Schleiden, Schwann, and Virchow, who observed that plants and animals are made of cells and that cells reproduce through dividing.

1. The Cell Theory All living things are made of cells. Cells are the basic units of structure and function in living things (in other words, a cell is the basic unit of life). (3) All cells come from other cells. Where did these three ideas come from? 1750 1825 1900 1600 1675

2. Robert Hooke - English Scientist - Identified 1st cells (1663) 1750 1825 1900 1600 1675

3. Anton van Leeuwenhoek - Dutch Businessman - Identified 1stliving cells (1674) 1st cells (1663) 1750 1825 1900 1600 1675

7. The Cell Theory Explained The important scientific discoveries of these five scientists contributed to the development of “The Cell Theory”. All cells come from cells (1855) 1st living cells (1674) Animals made of cells (1839) Plants made of cells (1838) 1st cells (1663) 1750 1825 1900 1600 1675

8. The Cell Theory Review All living things are made of cells. Cells are the basic units of structure and function in living things (in other words, a cell is the basic unit of life). (3) All cells come from other cells. All cells come from cells (1855) 1st living cells (1674) Animals made of cells (1839) Plants made of cells (1838) 1st cells (1663) 1750 1825 1900 1600 1675