Animal and plant cells
Animal and plant cells
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Biology and genetics
Animal and plant cells
The microscope
Organisms (living things) are made up of cells. Cells differ in shape, size and function.
The microscope can be used to examine plant and animal cells.
Component |
Function |
Eyepiece |
Magnifies the image |
Focus wheels |
Focuses the image |
Objective lenses |
Magnifies the image |
Stage |
Supports the Slide |
Slide |
The specimen is placed on the slide |
Light-bulb |
Light source |
To prepare plant cells for viewing under a microscope
- Place a drop of iodine onto a clean glass slide (iodine is used to stain (‘dye’) a cell and make it easier to see).
- Cut an onion and remove a thin layer of inner cells.
- Place it on the slide and place a cover slip on top.
To prepare animal cells for viewing under a microscope
- Use a cotton swab to get cheek cells and smear this onto a slide.
- Put a couple of drops of methylene blue stain on the smear and leave for a few mintues.
- Rinse off the stain and allow the slide to dry.
To examine a plant or animal cell under a microscope
- Put a piece of tissue on the slide and cover it with a glass slip.
- Place the glass slide on the stage and secure with clips.
- Watch from the side and turn the coarse focus wheel so that the objective lens is as close to the stage as possible.
- Put your eye to the eyepiece and gently turn the fine focus wheel the opposite way to sharpen the image.
Animal Cell |
|
Plant Cell |
|
Part |
Function |
Cytoplasm |
Most of the cell’s activities happen here |
Cell membrane |
Holds in the contents of the cell and controls what enters and leaves the cell |
Nucleus |
Controls the activities of the cell |
Vacuoles |
Store food |
Cell wall |
Provides support and structure to plant cells |
Chloroplasts |
These contain chlorophyll which makes food for plant cells |
Source : http://www.thephysicsteacher.ie/JC%20Science/JC%20Biology/Student%20Notes/2.%20Animal%20and%20Plant%20Cells.doc
Web site link: http://www.thephysicsteacher.ie/
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Animal and plant cells
Animal and plant cells
Animal and plant cells
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Animal and plant cells
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