1. Unit 3 Cell Structure and Function
Section 7.1
Cell Theory

2. 1) What is a cell?
2) What does the nucleus do?
3) What is a eukaryote and prokaryote?

3. Discovery of the Cell
1665: Robert Hooke identified dead plant cells, and named the “cell”
1673: A. Leeuwenhoek is the 1st person to observe living cells

4. Germany 1839: all organisms made of cells.
Matthais Schleiden (Plants)
Theodor Schwann (Animals)
Germany 1839: all organisms made of cells.

5. Rudolf Virchow (Germany 1858): all cells come from cells.

6. The Cell Theory All living things are composed of one or more cells
Cells are the basic unit of structure and function in organisms
All cells come from the reproduction for pre-existing cells

7. Cell Diversity All cells have different shapes, sizes, and functions
The size and shape of a cell will relate to its ___________

8. Cell Diversity Size: Shape:
Cells are limited by their outer surface area and volume
Shape:
The shape relates to the cell function
Nerve cells

9. Red and White Blood Cells

10. Cell Diversity Internal Organization:
Organelle: cell components that performs ____________ for the cell
Will maintain life for the cell
Cell is surrounded by a ___________
Each organelle has its own membrane
Nucleus:

12. Cell Diversity
Eukaryotes: organisms that contain a membrane-bound nucleus and organelles
Animal cells
Prokaryotes: unicellular organisms that lack membrane-bound nucleus and organelles
bacteria

13. Compare and Contrast the Eukaryotic and Prokaryotic Cell
Cell membrane
Cytoplasm
Prokaryotic Cell
Nucleus
Eukaryotic Cell
Organelles

15. Eukaryote and Prokaryote

16. Cell Biology
4/22/2017
G. Podgorski, Biol 1010

17. Bacteria Magnified
Bacteria on the tip of a pin