Using a Compound Light Microscope And Observing Live Protists
Jan 11, 2016
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• how many across
Human Skin Cells 400XNucleus plasma membrane cytoplasm
Onion Cells400 X
nucleus
Cell wall
Potato Cells400 X
• Dyed with iodine
Starch crystals
Elodea Cells
• 100 X 400 Xchloroplasts
Elodea Cells
• In fresh water In salt water• Full water vacuole empty water vacuole
Cyclosis in Elodea
• Cyclosis in Elodea 1:09• Elodea cyclosis 1:56• Rapid cycling of cytoplasm• You can see the chloroplasts moving also
STENTOR
• Stentor youtube 2:36• Stentor Cilia 40 sec• Horn-shaped• Up to 2 mm long• Cilia to bring in food• Stretches
Blespharisma
• 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
1-3 mm longSpiral rows of ciliaCan be seen without a microscope
mouth