1. The Cell Theory
Ch. 2.3

2. The development and refinement of magnifying lenses and light microscopes made the observation and description of microscopic organisms and living cells possible.
The Cell Theory

3. The Cell Theory
Many scientists contributed to the cell theory

4. The Cell Theory 3 parts to the cell theory:
1. The cell is the basic unit of life
2. All living things are made of cells
3. Cells come from pre-existing cells
The Cell Theory

5. Invented one of the first compound microscopes
He observed that cork has small regular boxes in it that he called “cells”.
Robert Hooke ( )

6. Hooke’s cork cells

7. Anton van Leeuwenheok (1632-1723)
Perfected the lens that lead to modern-day microscopes
Dutch scientist who was the first to see bacteria and protists.
Anton van Leeuwenheok ( )

8. Leeuwenhoek’s Microscope

9. Scottish botanist who noticed that all cells have a dark region that he called a “nucleus”
Robert Brown ( )

10. Matthais Schleiden (plants) Theodor Schwann (animals)
Theodor Schwann and Matthais Schleiden stated that all living things are made of cells. (1839)
Matthais Schleiden (plants)
Theodor Schwann (animals)

11. German scientist who discovered that all cells come from pre-existing cells.
Rudolph Virchow ( )

12. Continued advances in microscopy allowed observation of cell organelles and structure.
The Cell Theory