Thames & Kosmos Kids First: Biology Lab (V 2.0) handleiding
Handleiding
Je bekijkt pagina 21 van 36
19
Animal Cells and “Guinea Pigs”
A
n
i
m
a
l
C
e
l
l
s
a
n
“
g
N
e
P
i
G
”
Human cell size
comparison
You will need
– 2 Slides
– 2 Cover slips
– Pipette
– Water
– 2 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” (your parent or other adult supervisor) 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.
What do you observe? Are the cells swabbed
from your “guinea pig’s” mouth larger than the
cells swabbed from your own mouth?
EXPERIMENT
6
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. You
should see that these cells are about the same
size regardless of the age of the person they
came from. This swabbing method is used to
take cell samples to solve criminal cases and
for various health tests. More extensive
examinations are usually necessary for these
types of things than just looking at the cells
through a microscope.
W
H
a
’
S
P
P
I
?
Bekijk gratis de handleiding van Thames & Kosmos Kids First: Biology Lab (V 2.0), stel vragen en lees de antwoorden op veelvoorkomende problemen, of gebruik onze assistent om sneller informatie in de handleiding te vinden of uitleg te krijgen over specifieke functies.
Productinformatie
| Merk | Thames & Kosmos |
| Model | Kids First: Biology Lab (V 2.0) |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 24679 MB |
