CELL LAB REVIEW
ALL EUKARYOTIC CELLS
LEAF; CORK; ONION; SKIN CELLS FROM
CHEEK AND ARM
 What organelles are visible with the light
microscope?
 How is each cell’s structure related to its
function?

PLANT CELL
LEAF
 CORK
 ONION
 What organelles do they have in
common?
 What organelles are different?
 How are the similarities and differences in
STRUCTURE related to the FUNCTION of
these plant parts?

Elodea 100X
There are 2 layers! Use fine
adjustment to focus on just 1.
cell wall
chloroplast
cytoplasm
Where is the cell membrane?
elodea 400X
vacuole
?
cyclosis
Onion 40X
?
Onion 100X
Onion 400X
LEAF
photosynthesis
BULB – fleshy leaves
on a short stem
Carbohydrate storage
Onion
CELL
WALL
CORK 400X
CELL
WALL
CORK 400X
•Holes are empty
•Only cell wall
remains
•Reminded Robert
Hooke of small
rooms or CELLS
ANIMAL CELL
CHEEK CELLS
 SKIN CELLS
 How are the like each other? How
different?
 How are they like the plant cells?
 How are they different from plant cells?

CHEEK CELLS unstained
CHEEK CELLS 40x
CHEEK CELLS 100x
CHEEK CELLS 400x
CHEEK CELLS 400x
cell membrane
nucleus
cytoplasm
CHEEK CELLS 400x
THESE CELLS
ARE ALIVE
CHEEK CELLS 400x
SORRY NO PHOTO FOR YOUR
SKIN CELL SLIDE!
Function:
To cover and protect a surface
These are dead cells – heavily keratinized
(keratin is a protein)
Like “floor tiles”
SEM OF SKIN CELLS
PROKARYTOTIC CELLS
What organelles do they possess?
 Compare them to eukaryotes.

Staphlococcus aureus
X400
E. coli
X1000
unknown
DIAMETER
TYPICAL PROKARYOTE 0.2-2.0 μm
TYPICAL EUKARYTOE
10-100 μm
RIBOSOME
Prokaryote – 20 nm
Eukaryote – 25-30 nm
MEMBRANE WIDTH
7-10 nm
NUCLEUS DIAMETER
0.01 nm
LIES MY TEXT BOOK TOLD ME
Are animal cells spheres?
 Are plant cells box-shaped?
 Are cells colorful?
 What determines the shape of any cell type?
