cell theory
Category: Other
Updated: 21 Aug 2018
cell theory
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Created byOJ Williams
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Events
Galileo -
In 1625 The Italian scientist
Galileo Galilei improved
upon the first microscope
and did the first scientific
observations with it.Robert Hooke-
In 1665 Hooke discovers
the honeycomb like
structures in a cork slice
using a compound
microscope. Coined
the term "cells".Anton van Leeuwenhoek-
In 1670, a Dutch biologist
looks at pond water
with a microscope he made
lenses for.He called the
organisms he found within the
water “animalcules,” which
means “miniature animals".Karl Rudolphi and J.H.F. Link-
In 1804, they were the first to
prove that cells were
independent of each other.
Prior to this work, it was thought
that cells shared their walls
and that was how fluids
were transported between them.Robert Brown-
In 1833, an English
botanist, discovered the
nucleus in plant cells.Matthias Schleiden-
In 1838, a German botanist
proposes that all plant
tissues are composed of cells,
and that cells are the basic building
blocks of all plants. This statement
was the first part of the cell theoryTheodor Schwann-
In 1839, a German botanist reached
the conclusion that plants and
animal tissue as well is composed
of cells. He also pulled together and
organized previous statement on cells
into one theory, which states:
that first, Cells are organisms and all
organisms consist of one or more
cells and second, the cell is the basic
unit of life for all organisms.Rudolph Virchow-
In 1855, Virchow, a German physiologist
added to the 3rd part of the cell theory.
"All cells develop only from preexisting
cells". He was also the first to propose
that diseased cells come from healthy cells.Hans and Zacharias Janssen-
In 1590, they became known for
inventing the compound optical
microscope. This contributed to
"The Cell Theory" by making it easier
and more practical whilst observing cells.Louis Pasteur-
In 1862, Pasteur discovered
that microorganisms cause
fermentation and disease, created
the process of pasteurization,
and developed vaccines against
anthrax and rabies.
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