1. Discovering Cells

2. The smallest unit that can perform all life processes
Explain this statement: Cells are the basic units of structure and function of living things
The smallest unit that can perform all life processes

3. Who discovered cells? Robert Hooke (1663)
Used a compound microscope (2 lenses)
Looked at cork under microscope
Named what he saw, “cells”

4. Robert Hooke Contributions:
- He observed pieces of cork from the bark of a cork tree under the microscope.
- His observations led him to coin the word “cell.”
- “Cell”- means little rooms in Latin
- He compared the small boxes to the small rooms that monks lived in.

5. Anton van Leeuwenhoek (1632-1723)
Used a simple microscope to look at pond scum.
Saw “wee beesties” and “animalcules”
He is known as the “Father of Microscopy.”

6. Anton van Leeuwenhoek Discoveries:
- 1673: He looked at pond scum under the microscope and discovered small organisms he called animalcules or little animals (Protists)
- 1676: discovered bacteria Remember teeth gunk?

7. Development of Cell Theory
Widely accepted explanation of the relationship between cells and living things
Contributors to Cell Theory
Matthais Schleiden (1838)
Theodor Schwann (1839)
Rudolf Virchow (1855)

8. Matthias Schleiden (1804-1881)
German botanist
Discovered that all plants were made of cells
Contributed to the creation of the cell theory

9. Theodor Schwann (1810-1882) German zoologist
Concluded that all animals are made of cells.
Contributed to the creation of the cell theory

10. Rudolph Virchow (1821-1902) German pathologist He is known as the
“Father of Pathology.”
Discovered that all living cells come only from other living cells.

11. The Cell Theory All living things are made of cells.
Cells are the basic units of structure and function in living things.
Living cells come only from other living cells.