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