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THE PEOPLE WHO FIRST INVESTIGATED CELLS
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THE PEOPLE WHO FIRST INVESTIGATED CELLS. Zacharias Janssen: 1590 Dutchman; maker of reading glasses Put 2 magnifying glasses in a tube. (1st crude compound.

Jan 19, 2016

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Page 1: THE PEOPLE WHO FIRST INVESTIGATED CELLS. Zacharias Janssen: 1590 Dutchman; maker of reading glasses Put 2 magnifying glasses in a tube. (1st crude compound.

THE PEOPLE WHO FIRST INVESTIGATED CELLS

Page 2: THE PEOPLE WHO FIRST INVESTIGATED CELLS. Zacharias Janssen: 1590 Dutchman; maker of reading glasses Put 2 magnifying glasses in a tube. (1st crude compound.

Zacharias Janssen:Zacharias Janssen:

• 1590• Dutchman; maker of reading

glasses• Put 2 magnifying glasses in a

tube. (1st crude compound microscope)

Page 3: THE PEOPLE WHO FIRST INVESTIGATED CELLS. Zacharias Janssen: 1590 Dutchman; maker of reading glasses Put 2 magnifying glasses in a tube. (1st crude compound.

Anton Van Anton Van Leewenhoek:Leewenhoek:• Mid-1600’s• Dutch scientist• Saw organisms

in pond water by making a simple microscope with a tiny glass bead for a lens

Page 4: THE PEOPLE WHO FIRST INVESTIGATED CELLS. Zacharias Janssen: 1590 Dutchman; maker of reading glasses Put 2 magnifying glasses in a tube. (1st crude compound.

Anton Van Anton Van Leewenhoek:Leewenhoek:

Page 5: THE PEOPLE WHO FIRST INVESTIGATED CELLS. Zacharias Janssen: 1590 Dutchman; maker of reading glasses Put 2 magnifying glasses in a tube. (1st crude compound.

Robert Hooke:Robert Hooke:

• 1665• English scientist• Saw cork slices under the

microscope• Named the “little boxes” he saw

“cells”

Page 6: THE PEOPLE WHO FIRST INVESTIGATED CELLS. Zacharias Janssen: 1590 Dutchman; maker of reading glasses Put 2 magnifying glasses in a tube. (1st crude compound.

Matthias Schleiden:Matthias Schleiden:

• 1838• German Scientist• Studied plant parts with

microscope• Said all plants were made of cells

Page 7: THE PEOPLE WHO FIRST INVESTIGATED CELLS. Zacharias Janssen: 1590 Dutchman; maker of reading glasses Put 2 magnifying glasses in a tube. (1st crude compound.

Theodor Schwann:Theodor Schwann:

• 1839• German Scientist• Deduced that all animals were

made up of cells

Page 8: THE PEOPLE WHO FIRST INVESTIGATED CELLS. Zacharias Janssen: 1590 Dutchman; maker of reading glasses Put 2 magnifying glasses in a tube. (1st crude compound.

What was “Spontaneous What was “Spontaneous Generation”?Generation”?

• People thought that life could be created “spontaneouslyspontaneously”

• They even had “recipesrecipes” for certain living things:

To create mice, a recipe called for dirty underwear and wheat grain to be mixed in a bucket and left open outside. In 21 days or less, you would have mice. The real cause may seem obvious from a modern perspective, but to the proponents of this idea, the mice spontaneously arose from the wheat kernels.

Page 9: THE PEOPLE WHO FIRST INVESTIGATED CELLS. Zacharias Janssen: 1590 Dutchman; maker of reading glasses Put 2 magnifying glasses in a tube. (1st crude compound.

Rudolph Virchow:Rudolph Virchow:

• ~1855• German Doctor• Deduced that all cells come from

other cells

Page 10: THE PEOPLE WHO FIRST INVESTIGATED CELLS. Zacharias Janssen: 1590 Dutchman; maker of reading glasses Put 2 magnifying glasses in a tube. (1st crude compound.

Cell TheoryCell TheoryWhat we now believe to be true

about cellsThere are three parts:1) All organisms are made up of one

or more cells2) Cells are the basic units of

structure & function in all organisms

3) All cells come from cells that already exist

Page 11: THE PEOPLE WHO FIRST INVESTIGATED CELLS. Zacharias Janssen: 1590 Dutchman; maker of reading glasses Put 2 magnifying glasses in a tube. (1st crude compound.

Characteristics of Characteristics of Living ThingsLiving Things

Traits something must have in order to be considered alive.

Characteristics of Life Video Clip

Page 12: THE PEOPLE WHO FIRST INVESTIGATED CELLS. Zacharias Janssen: 1590 Dutchman; maker of reading glasses Put 2 magnifying glasses in a tube. (1st crude compound.

Characteristics of Characteristics of Living ThingsLiving Things

Traits something must have in order to be considered alive. 1) Reproduces

2) Grows & develops3) Sensitivity – responds to outside world4) Uses energy - eats food or makes food5 ) Can move in some way6) Breathes/exchanges gas7) Excretes – gets rid of wastes