1. Life is Cellular
Chapter 7 Sec. 1

2. Discovery of the Cell
1665 Robert Hooke – slice of cork
“little boxes”

3. Discovery of the Cell
Anton van Leeuwenhoek 1673 – live cells

4. Cell Theory All living things are made of cells.
Basic unit of structure and function in living things
Cells come from other cells.

5. Cell Theory Schleiden – plants composed of cells
Schwann – animals composed of cells
Virchow – cells come from other cells

6. Cell Diversity Over 200 types in your body
Size – some can be seen with eye and some are very small

7. Cell Size Volume increases faster than surface area
Nutrients have to pass through cell surface to maintain homeostasis
Limits size!!!!

8. Cell Shape
Shape depends on function of cell.

9. Internal Organization
Organelles – cell organs that perform a specific function

10. Internal Organization
Cell Membrane – surrounds and protects the cell

11. Internal Organization
Nucleus - cell’s brain (contains DNA)

12. Eukaryotes
Eukaryotes – contain membrane bound nucleus

13. Prokaryotes
Prokaryotes – lack a membrane bound nucleus and other organelles
bacteria