1. MICROSCOPES

2. THE MICROSCOPE AS A TOOL FOR CELL RESEARCH
Once the microscope was developed, scientists were able to see and study small things.
Today, biologists use different types of microscopes to explore cell structure and function.
Cells can be viewed under a microscope to look for abnormalities.

3. COMPOUND LIGHT MICROSCOPE
The compound light microscope uses two sets of lenses.
the objective
the eye piece eg
Objective lens= 40x
eyepiece is =10x
Total magnification x 10 = 400x

4. COMPOUND LIGHT MICROSCOPE
Part
Function
1. Revolving nosepiece
Holds the objective lenses
2. Objective lenses
Magnify specimen; three
lenses are usually 4X, 10X, and 40X
3. Stage
Supports the slide for observation

5. COMPOUND LIGHT MICROSCOPE
Part
Function
4. Diaphragm and Iris
pass light and adjusts the light through the specimen
5. Condenser lens
Focuses light onto the
specimen
6. Fine adjustment knob
Sharpens an image

6. COMPOUND LIGHT MICROSCOPE
Part
Function
7. Coarse adjustment
knob
Moves the stage up or down to focus on the specimen
8. Stage clips
Hold the slide in position
on the stage
9. Eyepiece
Magnifies the specimen, usually by 10X; single lens

7. Find and focus on the specimen
The LOW RULES
1. low stage
2. lowest magnification
3. low light

8. Place a drop of water on a coverslip Float specimen on the water drop
Preparing a Wet Mount
Place a drop of water on a coverslip
Float specimen on the water drop
Place a coverslip over the slide (folding it over carefully as to not trap air bubbles
Apply a drop of stain to the edge of the cover slip

10. LAB

11. Biological drawings

12. Biological drawings

13. Biological drawings