1.Ocular lens magnifies

10X2. Body tube

3. Arm

4. Revolving nose piece

5. Stage clip

6. Objective lenses magnify 4x, 10x and 40x7. Adjustment

knob8. Slide

9. Stage10. Coarse adjustment knob (low power)13. Fine

adjustment knob

12. Light

14. Power switch15. Base

11. Iris Diaphragm

= total magnification

magnification of ocular lens

x magnification of objective lens

Example:

10 x 40 = 400x

Microscope parts and functions Part Part

##Part Part

NameNamePurpose of PartPurpose of Part

11 Look through this to see an object under the microscope. Usually 10X magnification.

22 Connects the ocular to the microscope.

33 Connects the base and the barrel.

44 Turns to change the objective lenses to use.

55 Holds the slide in place

66 Used to view objects at three different magnifications

77 Moves the stage side-to-side, or forward and back to get the object into the field of view

Ocular lens

Body Tube

Arm

Nose piece

Stage Clip

Objectivelens

Stageadjustment

knob

Microscope parts and functionsPart

#Part

NamePurpose of Part

88 Piece of glass onto which the object to be viewed is placed

99 Holds the slide for viewing

1010 Raises and lowers the stage for focusing under low power

1111 Adjusts the amount of light entering the field of view

1212 Source of light

1313 Slightly moves the stage to sharpen the image

1414 Turns the illumination on or off

1515 Supports the microscope

Slide

Stage

Coarsefocus

Irisdiaphragm

Lamp

FineFocus

PowerSwitch

Base

Vesicle/vacuole - storage

RibosomesMake proteins

Lysosome - digestion

Cell membrane- semi-permeable

Cytoplasm - fluid

Centrioles- Cell division

Nucleus - brain

14. MitochondrionMakes energy (ATP)

Animal Cell

Chromosome - DNA

Nucleolus – makes RNA and ribosomes

Golgi complex - packagesEndoplasmic Reticulum - transport

Bozeman – A tour of the Cell

http://www.youtube.com/watch?v=1Z9pqST72is

From 5:17 to end

Special Plant Structures

Cell Wall

Chloroplast

Vacuole

Vacuoles• Larger in plants than

animals

Function

• Storage of food and water and waste

Vacuoles

When a plant cell has stopped growing there is usually one very large vacuole. Sometimes that vacuole can take up more

than half of the cell's VOLUME. The vacuole holds large amounts of water or food. The vacuoles can also hold the

plant waste products.

Chloroplast

ChloroplastStructure• Contains chlorophyll and enzymes required

for photosynthesis• Contains ribosomes and a small loop of DNA

ChloroplastFunction• Production of

carbohydrates - glucose

6CO2 + 6H2O 6O2 + C6H12O6 (glucose)

• The process of producing these carbohydrates is known as photosynthesis

Cell Wall

Cell WallStructure• Found in plant cells, made of layers of

celluloseFunction• Support and protection of the cell

Cell membrane vs. Cell wall

Plant Cell Diagram

Cell wall - cellulose

Nucleus - brain

Nucleolus – makes RNA

Chromosome - DNA

Mitochondrion - energy

Chloroplast - photosynthesis

Golgi complex – packaging

Cell membrane

ribosomes- make proteins

Vacuole - storage

cytoplasm

E.R. - transport

Lysosome - digestion

Plant cell Animal Cell

Both

Cell Wall

chloroplast

Centrioles

vacuolesnucleus

nucleolus

CytoplasmGolgi

complexRibosomeslysosomesmitochondri

acell membranevesicles

E.R.

nucleus

nucleolus

ribosomes

Cell membraneCell wall

cytoplasmGolgi complex

mitochondrion

chloroplast

Vacuole chromosomes

Endoplasmic reticulum

vesicle or lysosome

How To Use a MicroscopeHow To Use a Microscope1. Make sure the objective lens with the lowest

power is in place.

2. Place the slide on the stage and secure the slide using the stage clip.

3. Use the coarse focus knob to bring the objective lens close to the slide. Use the fine focus knob to focus.

4. To move to high power, rotate the nosepiece to the high power objective lens. Use the fine adjustment knob to bring the image into focus.