The Microscope and Micro-Organism
Jan 13, 2016
The Microscope and Micro-Organism
First person to make and use a lot of microscopes.The first person to make
and use a lot of microscopes was a Dutchman named Anton Leeuwenhoek. Leeuwenhoek lived in the 1600s in the Netherlands, and owned a store full of cloth. Most of Leeuwenhoek’s microscopes were tiny things, not much larger than 1” x 2”.
How to calculate the Magnification on a microscope. To calculate the
magnification of the things you are looking at, multiply the power of the eyepiece by the power of the objective.
Making a Wet Mount Place a drop of water in
the center of the slide with an eye dropper.
Use tweezers to place the sample on the top of the water drop.
Hold the cover slip upright so that one edge of the slip touches the edge of the drop of water.
Gently lower the cover slip over the drop of water and sample, trying not to trap any bubbles.
Units of Measurement1 meter (m) =
_______ Centimeters (cm)
1 meter (m) = _______ Millimeters (mm)
1 centimeter = ______ Millimeters (mm)
100, 1,000 and 10
Parts of the MicroscopeEyepieceRevolving nosepieceThe armThe stageThe diaphragmThe coarse
adjustment knobThe mirror
EyepieceIs the part of the
microscope closest to your eye, through which you look. It contains the ocular lens, which makes the image produced by the objective’s lenses larger.
Revolving nosepieceHolds the objectives
and allows you to change objectives while looking at a slide.
The armIs the curved metal
piece that holds the body tube in place over the stage and the base.
The stageIs the flat surface on
which you put your slides or samples.
The diaphragmIs used to adjust the
amount of light shining through the sample on the stage.
The coarse adjustment knobIs the large knob
used to adjust the position of the body tube, allowing you to quickly bring your sample into view.
The mirrorLocated beneath the
stage and diaphragm, increase the amount of light shining through your sample.
Micro-OrganismVolvoxEuglenaCyclopsElodea leafHydraSpirogyraVorticellaAnabaena
VolvoxMost developed in a
series of genera that form spherical colonies.
Each mature Volvox colony is composed of numerous flagellate cells.
Euglenaunicellular protists,
of the class Euglenoidea of the phylum Euglenozoa (also known as Euglenophyta).
They are single-celled organisms. Currently, over 1,000 species of Euglena have been described.
Cyclopsis a genus of small
freshwater crustaceans (copepods)
characterized by a single eye spot on the head segment.
Cyclops also feature antennae, a segmented body, 5 pairs of legs, and a divided "tail" called a furca.
Elodea leafElodea leaf is
composed of two layers of cells.
HydraA simple fresh-water
animal possessing radial symmetry.
Hydras are predatory animals belonging to the phylum Cnidaria and the class Hydrozoa.[
They can be found in most unpolluted fresh-water ponds, lakes and streams in the temperate and tropical regions by gently sweeping a collecting net through weedy areas
SpirogyraAre green algae of the
order Zygnematales, named for the helical or spiral arrangement of the chloroplasts that is diagnostic of the genus.
It is commonly found in freshwater areas, and there are more than 400 species.
Vorticellais a genus of
protozoa, with over 16 known species.
They are stalked inverted bell-shaped ciliates, placed among the peritrichs.
AnabaenaAnabaena are from a
genus of filamentous cyanobacteria, or blue-green algae, found as plankton.
It is known for its nitrogen fixing abilities, and they form symbiotic relationships with certain plants, such as the mosquito fern.