using a compound light microscope and observing live protists
TRANSCRIPT
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Using a Compound Light Microscope
And Observing Live Protists
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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• how many across
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Human Skin Cells 400XNucleus plasma membrane cytoplasm
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Onion Cells400 X
nucleus
Cell wall
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Potato Cells400 X
• Dyed with iodine
Starch crystals
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Elodea Cells
• 100 X 400 Xchloroplasts
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Elodea Cells
• In fresh water In salt water• Full water vacuole empty water vacuole
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Cyclosis in Elodea
• Cyclosis in Elodea 1:09• Elodea cyclosis 1:56• Rapid cycling of cytoplasm• You can see the chloroplasts moving also
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STENTOR
• Stentor youtube 2:36• Stentor Cilia 40 sec• Horn-shaped• Up to 2 mm long• Cilia to bring in food• Stretches
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Blespharisma
• Blespharisma Youtube 2:49• Blespharisma 2:18• 150-300 µm long• Ciliate• Eat bacteria by drawing them in• Often pink
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Paramecium
• 50- 330 µm Slipper-shaped• Cilia, can spiral move• HD paramecium 13:06• Paramecium eating dyed yeast (Congo Red) 1:59
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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)
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Spirostomum
• Spirostomum youtube 50 secs• HD Spirostomum 1:40
1-3 mm longSpiral rows of ciliaCan be seen without a microscope
mouth