Transcript contributions to the cell theory

CONTRIBUTIONS TO
THE CELL THEORY
Timeline of scientists
and their discoveries
Anton van
leeuwenhoek
1600’s
Dutch
businessman
Observed tiny
organisms in
pond water
using a simple
light
microscope
Anton van
leeuwenhoek
Microscopic
organisms
from the
pond water
were
nicknamed
“wee beasties”
ROBERT HOOKE
1665
English
physicist
Observed
flowers,
insects, and
plant tissue
ROBERT HOOKE
Observed thin
slices of cork
(oak tree)
Coined the
term “cell”
based on the
rooms in a
monastary
ROBERT BROWN
1833
Observed
plant cells
under the
microscope
ROBERT BROWN
Observed a
dark
structure
inside each
cell and
coined the
term
“nucleus”
MATTHIAS SCHLEIDEN
1838
German
botanist:
scientist who
studies plants
Concluded
all plants are
made up of
cells
THEODORE SCHWANN
1839
German
biologist
Concluded
all animals
are made of
cells
RUDOLF VIRCHOW
1855
German
Physician
Studied cell
reproduction
Concluded
all cells arise
from
preexisting
cells
The cell theory
1. All living things are
composed of cells
2. Cells are the basic unit of
structure and function in
living things.
3. All cells arise from
preexisting cells.
Contributions To Science!
Benjamine Banneker
1731-1806
Astronomer,
Mathematician
Invented the 1st
Functional
clock…also an
author!
Charles Drew
1904-1950
Physician,
surgeon,
medical
researcher
Inventor of
the blood
bank!
Dr. Daniel Hale
1858-1931
Physician
1st open
heart
surgery!
Mae Jemison
1956- Present
Physician,
NASA
astronaut
1st black
woman in
space!
Marie Maynard Daly
1921-2003
1st black
woman To
Earn A Ph.D. in
Chemistry!
Stem Cell Research, NASA,
Biochemical Engineering!
Female Scientists!
Jacqueline K. Barton
discovered that DNA
conducts electric
current!
Margaret A. Liu
Liu's work has
shown that DNA
may offer "the
hope of better,
more stable
vaccines”