Cells through the ages
Made for you by Erin Spruill 
What is a cell?
http://web.jjay.cuny.edu/~acarpi/NSC/images/cell.gif
http://www.nhlbi.nih.gov/health/dci/images/sickle_cell_image_1.jpg
Scientific Method
• Science is never
final.
• What you learn
today, might be
different than what
your children learn in
the future.
http://culturesofscientificrevolutions.wikispaces.com/space/showi
mage/graphical_scientific_method_1.jpeg
http://www.biorap.org/pix/photo_sungraph.gif
Cell theory
• The Cell Theory
Cells are the basic units of life for all
organisms.
•
1. All living things are composed of one or
more cells.
2. Cells are organisms' basic units of
structure and function.
3. Cells come only from existing cells.
ANAXIMANDER
• Greek in the 6th century
B.C.
• Ionian Islands
• Primary thoughts of
concepts of evolution
• Sea creatures forced to
come ashore, and
evolved land creatures.
http://www.pytheas-travel.gr/map/eptaneseislands/images/ionian.slands.jpg
www.wikipedia.com
THE ATOMISTS
• Democritus (460 370 B.C.) - most
noted of group of
Greek
philosophers
• Followed
Anaximander's
view of evolution.
• Credited as father
of atomic theory
“if you have nothing,
nothing may be
created out of it.”
http://admin.satyacenter.com/item_files/article_273_2.jpg
ARISTOTLE
(384 - 322 B.C.)
•
Known for experimental approach and dissections.
•
Went from animal classification to connection b/w soul and body.
•
One of his famous thoughts hints genetic concepts:
"It is evident that there must be
something or other really
existing, corresponding to what
we call by the name of Nature.
For a given germ does not give
rise to any random living being,
nor spring from any chance one,
but each germ springs from a
definite parent and gives rise to
a predictable progeny.
And thus it is the germ that is
the ruling influence and
fabricator of the offspring."
Aristotle’s school in Mieza
schoolhttp://www.livius.org/a/1/greeks/aristotle_school.jpg
THE MICROSCOPE
• Major step for biology
http://www.iastate.edu/Inside/2002/0315/beranscope.jpg
• Galileo credited
with its invention
• telescope
http://antwrp.gsfc.nasa.gov/apod/image/0110/galileo_sustermans_big.jpg
Microscope magicians
Athanasius Kircher
(1602-1680 )
Anton van Leeuwenhoek
(1632-1723)
• discovered bacteria, protists,
• One of first to
observe microbes via
sperm cells, blood cells,
microscope
microscopic nematodes,
rotifers, & much more
• Reported plague was • Made many microscopes
caused by
microorganism
• Suggested effective
measures to prevent
spread of disease
http://protist.i.hosei.ac.jp/GIFs/protists.jpg
ROBERT HOOKE
(1635 - 1703)
• English naturalist coined
the term "cell" after
viewing slices of cork
through a microscope.
• Latin word cella which
means "storeroom" or
"small container".
• Documented his work in
the Micrographia (1665).
http://www.its.caltech.edu/~atomic/snowcrystals/earlyobs/micrographia.jpg
JEAN-BAPTISTE DE
LAMARCK
(1744 - 1829)
• Mostly animal
classification &
evolution theories
• Famous for this thought:
"Every step which Nature takes when making her
direct creations consists in organizing into
cellular tissue the minute masses of viscous or
mucous substances that she finds at her
disposal under favorable circumstances."
René
(Joachim Henri)
Dutrochet
(1776-1847)
• 1824 - found that:
– "the cell is the fundamental element in
the structure of living bodies, forming
both animals and plants through
juxtaposition."
http://upload.wikimedia.org/wikipedia/en/a/ae/Dutrochet.jpg
Robert Brown
(1773-1858)
• first sightings of internal action in
1827
• Brownian movement
– zigzag random
movement of microscopic
particles suspended
in liquid or gas
http://en.wikipedia.org/wiki/Robert_Brown_(botanist)
Johannes Muller
(1801-1858)
• created
connections
between biology
and medicine
http://en.wikipedia.org/wiki/Image:Mueller.Joh..jpg
Matthias Schlieden
(1804 - 1881)
• Says animals are composed of cells
• Founder of information
that made up cell theory,
but did not create the term
http://www.biologie.uni-hamburg.de/b-online/e01/schleide.htm
Theodor Schwann
(1810-1882)
• Brown’s student
• Created the term "cell theory" and
declared that plants were made of
cells.
http://home.tiscalinet.ch/biografien/biografien/schwann.htm
BIOGENIC LAW
• Rudolf Virchow
(1821 - 1902)
• Announced that
"every cell comes
from a cell".
http://io.uwinnipeg.ca/~simmons/1115/cm1503/celltheory.htm
Cellular reproduction
• 20 years later, the
ideas of cellular
reproduction were
developed.
http://mrskingsbioweb.com/images/mitosis.jpg
What is new today??
• ultrastructure
http://www.biosci.ohio-state.edu/~plantbio/osu_pcmb/images/Faculty/Meier/Fig4Lrg.jpg
QUESTIONS?
What do you think?
Please write at least
2 paragraphs about:
1) One new fact or
idea you learned
today.
2) How do you think
science will
change in your
lifetime?
http://www.jiskha.com/images/subjects/english/writing.gif