Transcript Using a Compound Light Microscope

Using a Compound Light
Microscope
And Observing Live Protists
how you found sizes of
microorganisms
• If the field diameter at 400 X is 450 µm,
• How big is one of the following cells?
• HINT: Divide 450 µm
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how many across
Human Skin Cells 400X
Nucleus
plasma membrane
cytoplasm
Onion Cells
400 X
nucleus
Cell wall
Potato Cells
400 X
• Dyed with iodine
Starch
crystals
Elodea Cells
• 100 X
chloroplasts
400 X
Elodea Cells
• In fresh water
• Full water vacuole
In salt water
empty water vacuole
Cyclosis in Elodea
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Cyclosis in Elodea 1:09
Elodea cyclosis 1:56
Rapid cycling of cytoplasm
You can see the chloroplasts moving also
STENTOR
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Stentor youtube 2:36
Stentor Cilia 40 sec
Horn-shaped
Up to 2 mm long
Cilia to bring in food
Stretches
Blespharisma
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Blespharisma Youtube 2:49
Blespharisma 2:18
150-300 µm long
Ciliate
Eat bacteria by drawing them in
Often pink
Paramecium
• 50- 330 µm Slipper-shaped
• Cilia, can spiral move
• HD paramecium 13:06
• Paramecium eating dyed yeast (Congo Red) 1:59
Euglena
• 25-100 µm
• Flagellate
• Euglena youtube 14:46
• Nice flagella movement 51 secs
Presence of flagella (animal-like)
Chlorophyll (plant-like)
Red spot (light sensitive)
Spirostomum
• Spirostomum youtube 50 secs
• HD Spirostomum 1:40
mouth
1-3 mm long
Spiral rows of cilia
Can be seen without a
microscope