SCIENTISTS AND CELL HISTORY Know the following scientists and their contributions to cell history.

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Presentation transcript:

SCIENTISTS AND CELL HISTORY Know the following scientists and their contributions to cell history

HOOKE Created the first compound microscope Viewed cork – observing tiny empty compartments Given Latin name cellulae (meaning small rooms) Origin of the biological term “cell”

Was inspired by Hooks research Created his own simple microscope (better than Hooke’s) Was the first scientist to discover bacteria LEEUWENHOEK

SCHWANN Zoologist Discovered that all animals are composed of cells SCHLEIDEN Botanist Discovered that all plants are composed of cells

VIRCHOW Proved that cells divide and create other cells PASTEUR Disproved spontaneous generation

OBSERVATIONS AND CONCLUSIONS OF THESE SCIENTISTS ARE CREDITED WITH THE CELL THEORY!!

CELL THEORY The cell is the basic unit of structure and function in all living things All cells come from pre-existing cells

Binocular scope Dissecting scope Allows low magnification of three- dimensional objects Resolution: 10X-40X

Compound Microscope Light Microscope Magnification of objects that are thin enough for light to pass through Resolution: 40X- 400X

Electron microscopes (2 types) magnify things on a fine scale to create a highly- magnified image Uses a beam of electrons to make image Resolution: 5000X- 2,000,000X This resolution is 1,000 times greater than a light microscope and about 500,000 times greater than that of a human eye.

Scanning Electron Microscope magnify the surface Up to 100,000X

Transmission Electron Microscope electrons pass completely through Insides of objects Up to 1 million times