Lesson 1:
CELL THEORY
ANIMAL CELL
PLANT CELL
CELLS
1665
Robert Hooke
•English Physicist
•“MICROGRAPHIA”
•known as a "Renaissance
Man" of 17th century
England for his work in
the sciences, which
covered areas such as
astronomy, physics and
Micrographia
- Observed the remains
of dead plant cells
“THE
FATHER
MICROBIOLOGY”
OF
published his observations
on tiny living organisms
which
he
named
animalcules
Anton van Leeuwenhoek
1676
1831
ROBERT BROWN
- compare diverse kinds of
plant specimens under the
microscope
- He markedly indicated that
there is a common thing about
them-they are all composed of
cells, and inside the cell is a
dark dense spot which he
termed as the nucleus.
Jakob Matthias Schleiden
German Botanist
“all plant parts are made
up of cells”
1838
Theodor Schwann
(1839)
•zoologist and a close
friend of Schleiden,
stated that all animal
tissues are composed of
cells, too
Rudolf
Virchow
(1858)
•concluded
that all cells
come from pre-existing
cells.
All living things are composed of
one or more cells
the cell is the basic unit of life
Describes the
property of
cell
all cells arise from pre-existing cells
Identification
All cells come
from preexisting cells
(1858).
2. All animals
are made up
of cells
(1839).
3. All plants are
made up of cells
(1838).
4. Tiny living
organisms are
observed (1676).
5. Thousands of tiny
empty chambers in
cork are called cells
(1665).
Date
Scientist
Discovery
1665
a.
Observed the remains of dead
plant cells
b.
Anton van Leeuwenhoek
c.
1838
Matthias Schleiden
d.
e.
f.
Stated that all animals are
made of cells
1858
g.
h.
14-19. What is the cell
theory and what does it
state?
20. (subject teacher
complete name) 