Thames & Kosmos Kids First: Biology Lab handleiding

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Handleiding

Human cell size

comparison

YOU WILL NEED

› 2 Slides, 2 cover slips, pipette

› Water, 2 clean cotton swabs, 1 permanent

marker (for marking the slides)

HERE’S HOW

1. Use the pipette to place a drop of water on

the center of the first slide.

2. Now, applying a little bit of pressure, wipe

the inside of your cheek with a cotton swab.

3. Dip the swab in the water drop on the slide.

4. Prepare a second slide and ask your “guinea

pig” to provide a tissue sample using the

second cotton swab.

5. Cover both samples with cover slips and

compare the cell sizes of the two specimens

under the microscope.

EXPLANATION

When you rub the inside of your cheek

with the cotton swab, it releases cells

from the mucous membrane. These cells

are then transferred to the slide, where

you can observe them under the

microscope. And what did you find?

Are the “guinea pig’s” cells larger than

your own cheek cells, or is there no

difference?

EXPERIMENT 6

Animal Cells and “Guinea Pigs”

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