1. 7-1 Cell Theory Prokaryotes vs. Eukaryotes
Cells

2. Discovery of the Cell and Cell Theory

3. How were cells discovered?
The first cell was discovered when Robert Hooke looked at cork under a microscope!
He saw thousands of tiny empty chambers

4. History of the Cell
1839: Schwann concludes that animals are made of cells
1838:
Schleiden concludes that plants are made of cells
1855:
Virchow proposes that all cells come from other cells completing the cell theory
1665: Hooke discovers the cell
1674: Van Leeuwenhoek observed tiny living organisms in pond water

5. Cell Theory All living things are made of cells.
A cell is the smallest unit of life.
All cells come from preexisting cells.

6. Prokaryotes vs. Eukaryotes

7. Prokaryote vs. Eukaryote
Cell membrane
Cytoplasm
Prokaryotic Cell
(bacteria)
Eukaryotic Cell
(plants and animals)
Nucleus
Organelles

8. Prokaryotes Unicellular (Single celled)
No nucleus- DNA is located in the cytoplasm in a simple circle

9. Eukaryotes Contain organelles Often multi-cellular
DNA is found chromosomes located inside the nucleus
These are the cells that YOU have!

10. Organelle What is an organelle?
A membrane bound structure that separates cell functions
Found in Eukaryotic cells
“little organ”

11. 2 Basic Cell Types
Prokaryotes
Eukaryotes

12. Prokaryotes vs. Eukaryotes
Nucleus
Endoplasmic reticulum
Golgi apparatus
Lysosomes
Vacuoles
Mitochondria
Cytoskeleton
Cell membrane
Contain DNA
Ribosomes