Microscopes and History Flashcards
Compound light microscope
uses light and lenses
can’t see beyond 1000x
views living and nonliving specimens
electron microscope
uses focused beam of electrons through the specimen
can’t view living things
transmission electron microscope
best used to see inside cells
scanning electron microscope
best used to see surface of specimens
what you look into in microscope
ocular lense eyepiece
maintains the proper distance between nosepiece and eyepiece
body tube
contains the objective lenses
revolving nosepiece
magnifies objects 4x
low power objective lense
magnifies objects 10x
medium power objective lense
magnifies objects 100x
high power objective lense
hold the slide in place
stageclips
controls the amount of light passing through the slide
diaphragm
provides light
light source
allows user to see the specimen, magnifies 10x
eyepiece
connects the revolving nosepiece to the body of the microscope
arm
supports the slide
stage
move the stage(or nosepiece) up and down
coarse adjustment knob
focuses the view of the specimen
fine adjustment knob
supports the microscope
base
remember to NEVER:
use the coarse adjustment knob on medium or high power objective lenses.
three parts of the cell theory
all organisms composed of one or more cells
the cell is the basic unit of structure and organization in organisms
Zacharias Jansen
came up with the microscope in the 1600s
Anton van Leeuwenhoek
created a paddle like microscope that worked really well
observed bacteria
How did Leeuwenhoek discover bacteria?
looking at teeth scrapings on the microscope
what did leeuwenhoek call bacteria
animalcules
Who named “the cell”
Hooke because they looked like cells in a monastary
Matthias Schleidan
realized all plants are composed of cells
Theodore Schwann
realized all animals were made of cells
Rudolph Virchow
showed cells did come from other cells, not just spontaneously being made
Robert Brown
discovered and named the nucleus
