1. Discovering Cells

2. All Living Things Are Made of Cells.
Cells are the basic unit of structure and function in living things

3. A microscope is an instrument that makes small objects look larger
Cells Are Discovered
The invention of the microscope led to the discovery of cells. (Hans Jensen made one of the first microscopes,1590)
A microscope is an instrument that
makes small objects look larger
Simple microscope has one
lens
Compound microscope has
more than one

4. Robert Hooke (1663) One of the first people to observe cells
Used a compound microscope he had built.
Observed cork
Cells looked like small rectangular rooms called them “cells”
One inch about 12 hundred million

5. Anton van Leeuwenhoek (1683)
Made his own lenses
Used simple microscopes
Observed pond water, named creatures animalcules
Observed teeth scrapings, first to see bacteria

6. Cell Theory Many scientists discoveries contributed.
Matthais Scheiden (1838) – plants composed of cells
Theodor Schwann (1839) – animals composed of cells
Rudolf Virchow (1855) – all cells come from existing cells

7. Cell Theory states All living things are composed of cells
Cells are the basic unit of structure and function in living things
All cells are produced from other cells