Download contributions to the cell theory

CONTRIBUTIONS TO THE
CELL THEORY
Timeline of scientists and their
discoveries
1) Anton von Leeuwenhoek
1600’s
Dutch businessman
Invented 1st simple
light microscope
Anton von Leeuwenhoek (con’t)
Observed tiny
organisms in pond
water
Organisms were
nicknamed “wee
beasties”
2) ROBERT HOOKE
1665
English physicist
Observed flowers,
insects, and plant
tissue
ROBERT HOOKE (con’t)
Observed thin
slices of cork (oak
tree)
Coined the term
“cell” based on the
rooms in a
monastary
3) ROBERT BROWN
1833
Scottish botanist:
scientist who
studies plants
Observed plant
cells under the
microscope
ROBERT BROWN (con’t)
Observed a dark
structure inside
each cell and coined
the term “nucleus”
4) MATTHIAS SCHLEIDEN
1838
German botanist
Concluded all
plants are made up
of cells
5) THEODORE SCHWANN
1839
German biologist
Concluded all
animals are made
of cells
6) 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.