1. Introduction to Cell Biology

2. Think about all of the things the human body does to keep you alive
Think about all of the things the human body does to keep you alive. Your heart pumps blood, your skin protects you, your stomach digests food…

3. However, the parts of your body do have 1 thing in common
However, the parts of your body do have 1 thing in common. They are all made of…
CELLS!
Cell – the most basic unit of life

4. What led to the discovery of cells?

5. Timeline
1590 – Hans and Zacharias Janssen (father & son) invent the first compound microscope
1665 – Robert Hooke observes cork and names the tiny chambers he sees, “cells”
Father of Microscopy

6. FYI Cork is the tough outer bark of a species of oak tree.
The plant cells Hooke observed were dead so he was really only looking at cell walls and empty space.

7. Compound Light Microscopes
Uses compound lenses to magnify objects
Some allow for binocular
(2 eyes) viewing of larger
specimens

10. How Does a Microscope Work?

11. Drawing Specimens Draw specimen in circle using pencil
Amoeba
Amoeba
Draw specimen in circle using pencil
Label specimen outside of circle
Indicate magnification

12. Magnification The total magnification is the ocular lens x objective
Scanning
10x 4x
40x
Low Power
100x
High Power
400x

13. Observations Observe a pre-made slide
Draw your observation under scanning and low power
Label the specimen and magnification