Meet the Scientists Developing the Cell Theory. What is a cell? The cell is a basic building block...

Meet the Scientists Developing the Cell Theory

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What is a cell?

• The cell is a basic building block of living things, both plant and animal.

All living things have cells.

• Plants • Animals

Cell Theory

• All organisms are composed (made up of) cells.

Tool used to view cells

Timeline - 1590

• Hans and Zacharias Janssen (1590), Dutch glasses makers, father and son. Produced first compound microscope (2 lenses).

1590

Hans & Zacahrias Janssen

Produced 1st compound microscope

Timeline- 1665

• Robert Hooke (1665), English Father of Microscopy, looked at a thin slice of cork through a compound microscope and observed tiny, hollow room like structures. He called them cells, but only saw the outer cell walls because the cork cells were not alive.

http://en.wikipedia.org/wiki/File:Hooke_Microscope-03000276-FIG-4.jpg

1590



1665

Robert Hooke

First to see cells in a piece

of cork

Timeline-1680

• Anton van Leeuwenhook (1680), Dutch Amateur Scientist, Father of Microscopy, first to see and describe bacteria, yeast, organism in pond water, and blood cells

http://en.wikipedia.org/wiki/File:Protist_collage.jpg

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1590



1665

1680s

Robert Hooke

Anton van Leeuwenhoek


of cork

First to observe living cells; Father of

Microscopy

Timeline-1838• Matthias Schleiden (1838), German

Botanist, viewed plant parts under a microscope and discovered that they are made of cells.

1590



1665

1680s 1838

Robert Hooke


Matthias Schleiden


of cork


Microscopy

Discovered plants are made of

cells

Timeline-1839

• Theodor Schwann (1839), German Zoologist, viewed animals parts under a microscope and discovered that they are made of cells.

1590



1665

1680s

1839

1838

Robert Hooke


Theodor Schwann

Matthias Schleiden


of cork


Microscopy


cells

Discovered animals are

made of cells

Timeline- 1855• Rudolph Virchow (1855), German

Physician, stated that living cells come only from other living cells.

Animal Cells

Plant Cells

1590



1665

1680s 1855

1839

1838

Robert Hooke


Theodor Schwann

Rudolph Virchow

Matthias Schleiden


of cork


Microscopy


cells

Discovered animals are

made of cells

Stated living cells come from other

living cells

CELL THEORY

• Based on the findings of Schleiden, Schwann, and Virchow

• All life forms are made from one or more cells

• Cells can only be made from other cells

• The cell is the smallest form of life

Meet the Scientists Developing the Cell Theory. What is a cell? The cell is a basic building block...

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