Download In 1839

By: Julie Poynter And Abigail Constant
In 1595…
Janssen invented microscopes.
-He discovered the microscope when he was just a teenager.
-The microscope was little more than two tubes with a lens on the
end of each tube. It focused by twisting the tubes. This
microscope magnified items by between three and nine times.
-Zacharias Janssen was born in 1580
In 1665…
He compared Honey Combs to Cells by
using his Primitive Compelled
microscope.
•He published his findings in his famous
work, Micrographia.
•He discovered important inventions but
he never did follow through and
experiment with them.
(Born: 1635 – Died: 1703)
In 1670…
He used his own single lens monocular
microscopes and was the first person to
observe bacteria and protozoa.
•He is known of making five-hundred
microscopes.
•He described cells in a drop of pond water
using a microscope.
•He is a Dutch businessman.
1837…
•Schwann remembered seeing similar structures in the cells of the
notochord and instantly realized the importance of connecting the two
phenomena and soon appeared in his famous Microscopic Investigations on
the Accordance in the Structure and Growth of Plants and Animals.
• Theodor Schwann declared that "All living things are composed of cells
and cell products”
• He thought the same thing as Schleiden. That all plan tissue are composed
of cells.
In 1838…
•
He concluded that all plan tissue are composed of cells.
•
He also included that an embryonic plant arose from a single cell.
•
He declared that the cell is the basic building block of all plant matter.
In 1839-1843…
•From a farming family of German and
Polish Slavonic heritage, Virchow studied
medicine and chemistry in
Berlin at the Prussian Military Academy 1839-1843 on a
scholarship of dinner.
Virchow's most widely known scientific contribution is
his cell theory, which built on the work of Theodor
Schwann. He is cited as the first to recognize leukemia
cells.
In 1854…
•
Louis was named Dean of the new Faculty of Sciences in
Lille.
•
He exposed boiled broths to air in vessels that contained a
filter to prevent all particles from passing through to the
growth medium, and even in vessels with no filter at all, with
air being admitted via a long tortuous tube that would not
allow dust particles to pass.
Jansenn-1595
Leeuwenhoek1670
Hooke-1665
Schleiden-1838
Schwann-1837
Pasteur-1854
Virchow-18391843
•http://www.smithlifescience.com/celltheory.html
•http://en.wikipedia.org/wiki/Robert_Hooke
•http://en.wikipedia.org/wiki/Rudolf_Virchow