1. A Re-introduction to Cells

2. The History of the Cell The Cell The basic unit of any organism
Discovery made possible by the invention of the microscope

3. Microscopes and Cells 1600s
Anton van Leeuwenhoek first described living cells as seen through a simple microscope.

4. Microscopes and Cells
Robert Hooke used the first compound microscope to view thinly sliced cork cells.
Compound scopes use a series of lenses to magnify in steps.
Hooke was the first to use the term “cell”.

5. Microscopes and Cells 1830s
Mathias Schleiden identified the first plant cells and concluded that all plants made of cells.
Thomas Schwann made the same conclusion about animal cells.

6. The Cell Theory All organisms are made up of one or more cells.
The cell is the basic unit of structure and function in all organisms.
All cells come from other cells.

7. Two Basic Cell Types Prokaryotic - Without a well-defined nucleus
- No organelles except for ribosomes
- Smaller

8. Two Basic Cell Types 2. Eukaryotic
With a ‘true’ nucleus surrounded by a membrane
With a full complement of organelles
Larger

9. Life’s 6 Kingdoms Prokaryotic Eukaryotic
All of the approximately 2 million different kinds of living things (species) on the Earth are classified into one of six kingdoms :
Archaebacteria
Eubacteria
Protista
Fungi
Plants
Animals
Prokaryotic
Eukaryotic

10. What cellular organelles do you remember?
vacuoles
nucleus
mitochondria
ribosomes
cytoplasm
nucleolus
endoplasmic reticulum

11. Animal Cell

12. Plant Cell