cell discovery
Post on 07-Jan-2016
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CELL DISCOVERY
ANTON VON LEEUWENHOEK
First microscope used to
view organisms Dutch tradesman and self-prescribed scientist
1660’s “Father of microscopy” Improved the microscope (worked with glass) First to see living things in a drop of water - “animicules”
ROBERT HOOKE
1665 Cork Cells Coined the term “CELL” His work was accepted in the scientific community His work was published including many illustrations
CELL THEORY
In 1839: Schleiden & Schwann
1. All living things are made of cells2. Cells are the basic unit of structure and function in living things
In 1858: Virchow
3. All cells come from pre-existing cells
• Rudolf Rudolf Virchow (physician)
Mattias Schleiden
(Botanist)
Looked at plant cells
Theodor Schwann (Physiologist)
Looked at animal cells
ADDITIONS TO CELL THEORY4. All cells contain hereditary information that is passed from cell to cell during cell division.5. All cells have a similar chemical composition Plant cell Animal cell (white blood cells)
OTHER IMPORTANT CHARACTERISTICS OF CELLS They are the smallest unit of living things Most are .01 - .02 mm The small size allows for movement of materials across
membranes The largest cell is an egg Cells in many celled organisms have special jobs – they are
shaped to fit their job
TWO TYPES OF CELLS Prokaryote Eucaryote
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