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Cell Theory

Description and explanation of the Cell Theory

Nandan Nayak

on 15 December 2012

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Transcript of Cell Theory

The Cell Theory Goal
You will be able to
know the three parts of
the cell theory and name 7
scientists who were involved
in the Cell Theory Scientists

Robert Hooke
Anton Van Leuwenhoek
Robert Brown
Matthais Schlieden
Theodor Schwann
Rudolf Virchow
Walther Flemming Robert Hooke (1665)

*Hooke discovered empty spaces in cork and called them cells
*Called cells because they looked like little "cells" or rooms monks lived in at monasteries
*Thought cells only existed in plants and fungi
(Hooke wasn't looking at actual cells, only the empty spaces where cells used to be.) Anton Van Leuwenhoek (1673)

*Made homemade microscope to look at
pond water and found single cell oraganisms and
called them animalcules- looked like tiny animals
*Found blood cells in animal cells like fish, bird, frog, dog,
and human cells Robert Brown (1831)

*Discovered nucleus in cell
others had found this, but
didn't think it was very
important Matthais Schleiden (1838)

*German Botanist that discovered
all plants have cells Theodore Schwann (1839)

*Zoologist that discovered all animals
have cells Schleiden and Schwann are credited
for the first and second part of cell theory
-All plants and animals are made of cells
-Cells are the basic units of life Rudolf Virchow (1858)

*Discovered cells come from
preexisting cells
*This disproves Spontaneous Generation Virchow is credited for the third part of Cell Theory
-Cells must come preexisting cells Walther Flemming (1860)

*German Scientist stained cells
to better see cell reproduction
*Proved third part of Cell Theory The Cell Theory
-All plants and animals have cells
-Cells are the basic units of life
-Cells come from preexisting cell Modern Cell Theory
-The cell contains hereditary information(DNA) which is passed on from cell to cell during cell division
-All cells are basically the same in chemical composition and metabolic activities
-All basic chemical & physiological functions are carried out inside the cells.(movement, digestion,etc)
-Cell activity depends on the activities of sub-cellular structures within the cell(organelles, nucleus, plasma membrane) How Cell Theory is used

The basic discovered truths about cells, listed in the Cell Theory, are the basis for things such as:
Disease/Health/Medical Research and Cures(AIDS, Cancer, Vaccines, Cloning, The Human Genome Project, Stem Cell Research, etc) Test 1) What all three parts of cell theory 2)Write at least 6 scientists
who were involved in the
Cell Theory 3)What did Leuwenhoek first
call cells? 4) What was Robert Hooke looking
at when he found "cells"? 5) Was Theodore Schwann a zoologist
or botanist? Extra Credit: Name one thing on the Modern
Cell Theory
Full transcript