1. Cell Biology
4/25/2017
Why Study Cell Biology?
“…For every living organism is, or at some time has been, a cell.” E.B. Wilson, 1925
G. Podgorski, Biol 1010

2. Cell Biology
4/25/2017
Red and white blood cells
Cells are Us
A person contains about 100 trillion cells. That’s 100,000,000,000,000 or 1 x 1014 cells.
There are about 1,000 different cell types in humans
nerve cell
Cells are tiny, measuring on average about cm (20 um) across. That’s about 1250 cells per inch.
G. Podgorski, Biol 1010

3. How big are cells? Bacteria e.g. Eschericia coli (aka E.coli)
Size=1 µm by 3 µm (one millionth of meter!)

4. Human red blood cell = 8 µm

5. Largest cell = yolk of an ostrich egg

6. Cell Biology
4/25/2017
The Cell Theory ( )**
Schleiden
All organisms are composed of one or more cells.
Cells are the smallest living things.
Cells arise only by division of previously existing cells.
Schwann
G. Podgorski, Biol 1010

7. All cells today came from an original cell….

8. Bacteria on the Head of a Pin
Cell Biology
4/25/2017
Bacteria on the Head of a Pin
G. Podgorski, Biol 1010

9. Cell Biology
Animal Cell
4/25/2017
G. Podgorski, Biol 1010

10. The Nucleus Think of the nucleus as the cell’s control center.
Cell Biology
4/25/2017
The Nucleus
Think of the nucleus as the cell’s control center.
Two meters of human DNA fits into a nucleus that’s meters across.
G. Podgorski, Biol 1010

12. The Lysosome Functions: Digesting food or cellular invaders
Cell Biology
4/25/2017
The Lysosome
Functions:
Digesting food or cellular invaders
Recycling cellular parts
G. Podgorski, Biol 1010

13. Energy!! The Mitochondrion Cell Biology 4/25/2017
G. Podgorski, Biol 1010

14. Mitochondria and Health
Cell Biology
4/25/2017
Mitochondria and Health
G. Podgorski, Biol 1010

15. Cell Biology
4/25/2017
Plant Structures
G. Podgorski, Biol 1010

16. The Chloroplast The Solar Panel of the Plant Cell! Cell Biology
4/25/2017
The Chloroplast
The Solar Panel of the Plant Cell!
G. Podgorski, Biol 1010

17. Two Other Unique Features of Plant Cells
Cell Biology
4/25/2017
Two Other Unique Features of Plant Cells
The central vacuole may occupy 90% of a plant cell.
G. Podgorski, Biol 1010

18. Cell Walls = Great Strength
Cell Biology
4/25/2017
Cell Walls = Great Strength
G. Podgorski, Biol 1010

19. Cell Biology
4/25/2017
Cytoplasm
G. Podgorski, Biol 1010

20. The Cytoplasm in Action
Cell Biology
4/25/2017
The Cytoplasm in Action
A white blood cell using the cytoplasm to grab a bacterium.
G. Podgorski, Biol 1010

21. How do cells move?**
Flagella
Cilia
False feet

23. Cell Biology
4/25/2017
Cell movement
G. Podgorski, Biol 1010

24. Two Different Types of Cells**
Cell Biology
4/25/2017
Two Different Types of Cells**
A eukaryotic cell
Prokaryotic cell
G. Podgorski, Biol 1010

25. Us vs. Them -Eukaryotes and Prokaryotes
Cell Biology
4/25/2017
Us vs. Them -Eukaryotes and Prokaryotes
G. Podgorski, Biol 1010

26. Eukaryotes
Prokaryotes
Amoeba
Zombie Cells