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Investigating Cells Index

Looking at Onion Cells and Leaf Cells from Freshwater Pond Weed
Looking at Single-Celled Organisms

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How to use a Microscope
How to make a Microscope Slide
Chapter on Cells

Biology Practical Work index

Mouth Cells

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Skin Cells

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A dividing animal cell. The nucleus in each cell is visible © Paul Billiet

A dividing animal cell. The nucleus in each cell is visible

PRACTICAL WORK

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Laboratory Investigation on Cells
Looking at cells from multi-cellular Organisms

1. Mouth Cells

Take a cotton bud and gently rub it on the inside of your cheek. Smear the cotton bud onto a microscope slide to cover an area of about 1cm3. Now add one drop of methylene blue onto the smear. This will help you to see the cells more clearly. Carefully place a cover slip on top of the blue dye.

Look at the cells under the microscope with the objective lens x10. Compare what you see to the drawing below. Can you observe the same parts?

 

Drawing of typical animal cell ©  Shirley Burchill

 

Labels for the drawing: the cell membrane surrounds the cell, the cytoplasm contains food and all other substances to allow the cell to function and the nucleus contains all the hereditary information.

 

2. Looking at Skin Cells

Take apiece of sticky tape and stick it onto the inside of your wrist. Rub the tape so it sticks onto your wrist. Tear off one corner quickly. Stick the tape onto the microscope slide. Lift one corner of the sticky tape and place one drop of methylene blue onto the microscope slide and just under the tape. The liquid will move across the slide under the tape. Observe the slide using the x10 objective. Can you see any cells?

If you can, in the space below draw one of the cells that you see and label the drawing using the following words : cell membrane, cytoplasm and nucleus.

 









 




 

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