4-1 THE HISTORY OF CELL BIOLOGY

THE DISCOVERY OF CELLS  Cell – the smallest unit of life that can carryout all of the processes of life

THE DISCOVERY OF CELLS  There were many different contributions that led to our current understanding of cells

THE DISCOVERY OF CELLS  Robert Hooke

THE DISCOVERY OF CELLS  Robert Hooke  English Scientist

THE DISCOVERY OF CELLS  Robert Hooke  English Scientist  1665 – looked at cork under a microscope and saw little boxes; called them “Cells”

THE DISCOVERY OF CELLS  1665 – looked at cork under a microscope and saw little boxes; called them “Cells”

THE DISCOVERY OF CELLS  Anton van Leeuwenhoek

THE DISCOVERY OF CELLS  Anton van Leeuwenhoek  Dutch trader; made microscopes

THE DISCOVERY OF CELLS  1673 – saw first living organisms in pond water; called them “animalcules”

THE DISCOVERY OF CELLS  Matthias Schleiden

THE DISCOVERY OF CELLS  Matthias Schleiden  German Botanist

THE DISCOVERY OF CELLS  1838 – all plants are composed of cells

THE DISCOVERY OF CELLS  Theodor Schwann

THE DISCOVERY OF CELLS  Theodor Schwann  German zoologist

THE DISCOVERY OF CELLS  1839 – all animals composed of cells

THE DISCOVERY OF CELLS  Rudolf Virchow

THE DISCOVERY OF CELLS  Rudolf Virchow  German physician

THE DISCOVERY OF CELLS  1855 – Cells come from other cells

THE DISCOVERY OF CELLS  1855 – Cells come from other cells

THE DISCOVERY OF CELLS  The Cell Theory

THE DISCOVERY OF CELLS  The Cell Theory 1. All living things are composed of one or more cells.

THE DISCOVERY OF CELLS  The Cell Theory 2. Cells are the basic unit of structure and function

THE DISCOVERY OF CELLS  The Cell Theory 3. Cells come only from the reproduction of existing cells