1. 10/23/14 Good Morning Material Managers – please pass out folders Take out your Cornell Notes (blanks are up front) Label: Development of Cell Theory FQ: How has our understanding of cells changed over time?

3. Development of the Cell Theory 5 Scientists’ Contributions in the

4. Development of the Cell Theory Hooke 1. 1663 used compound microscope to observe cork slices. 2. Cork reminded him of rooms where monks lived. 3. Thus, coined term “Cell”.

5. Development of the Cell Theory Hooke 1. 1663 used compound microscope to observe cork slices. 2. Cork reminded him of rooms where monks lived. 3. Thus, coined term “Cell”. 1. 1683 Used a simple microscope to observe pond water; “animalcules” 2. First to observe bacteria (from his own teeth scrapings!) Van Leeuwenhoek Animalcules

6. Development of the Cell Theory Hooke 1. 1663 used compound microscope to observe cork slices. 2. Cork reminded him of rooms where monks lived. 3. Thus, coined term “Cell”. 1. 1683 Used a simple microscope to observe pond water; “animalcules” 2. First to observe bacteria (from his own teeth scrapings!) Schleiden 1. “Botanist” who studied plants at a German university 2. In 1838 said, “All plants are made up of cells.” Van Leeuwenhoek

7. Development of the Cell Theory Hooke 1. 1663 used compound microscope to observe cork slices. 2. Cork reminded him of rooms where monks lived. 3. Thus, coined term “Cell”. 1. 1683 Used a simple microscope to observe pond water; “animalcules” 2. First to observe bacteria (from his own teeth scrapings!) Schleiden 1. “Botanist” who studied plants at a German university 2. In 1838 said, “All plants are made up of cells.” Schwann 1. studied frog larvae (animals) at same German university as Schleiden 2. 1839 concluded “All animals are made up of cells.” Van Leeuwenhoek

8. Development of the Cell Theory Hooke 1. 1663 used compound microscope to observe cork slices. 2. Cork reminded him of rooms where monks lived. 3. Thus, coined term “Cell”. 1. 1683 Used a simple microscope to observe pond water; “animalcules” 2. First to observe bacteria (from his own teeth scrapings!) Schleiden 1. “Botanist” who studied plants at a German university 2. In 1838 said, “All plants are made up of cells.” Schwann 1. studied frog larvae (animals) at same German university as Schleiden 2. 1839 concluded “All animals are made up of cells.” Virchow 1. Studied how a cell reproduces 2. 1855 stated, “All cells come from pre-existing cells.” Van Leeuwenhoek

9. Development of the Cell Theory Hooke 1. 1663 used compound microscope to observe cork slices. 2. Cork reminded him of rooms where monks lived. 3. Thus, coined term “Cell”. 1. 1683 Used a simple microscope to observe pond water; “animalcules” 2. First to observe bacteria (from his own teeth scrapings!) Schleiden 1. “Botanist” who studied plants at a German university 2. In 1838 said, “All plants are made up of cells.” Schwann 1. studied frog larvae (animals) at same German university as Schleiden 2. 1839 concluded “All animals are made up of cells.” Virchow 1. Studied how a cell reproduces 2. 1855 stated, “All cells come from pre-existing cells.” Van Leeuwenhoek Cell Theory 1. All living things are made up of cells. 2. Cells are the basic unit of structure and function. 3. All cells come from other cells.