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Microscope/Cell Theo

Microscope/Cell Theory Science 7

TermDefinition
simple microscope microscope with only one lens that uses light to magnify
compound microscope uses two lenses and light to magnify
arm supports body tube; used with base to carry microscope
base bottom of microscope; used with arm to carry microscope
coarse adjustment quickly moves stage up and down; used first to focus image
diaphragm controls the amount of light on the slide
fine adjustment sharpens image; used second to focus image
light source illuminates the slide on the stage
nosepiece holds the objective lenses
objective lenses magnifies and focuses the image inside the body tube
ocular lens also called eyepiece; magnifies image
stage where the slide is placed
stage clips holds the slide in place
cell theory 1. all organisms are composed of one or more cells 2. a cell is the basic unit of structure and organization in organisms 3. all cells come from pre-existing cells
Van Leeuwenhoek discovered bacteria (aka animalcules)
Hooke coined the term "cell" after looking at cork under microscope
Schleiden all plants are made of cells
Schwann all animals are made of cells
Virchow cells come from other cells
body tube separates the objective and eyepiece
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