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Cell Theory
A Brief History
Presented by:
Fe Belen M. Samaniego
An introduction to cell theory...
History
Cells were unknown until the
discovery of microscopes in the
1650’s
two scientists working
independently built the...
Dutch tradesman and scientist
Studied pond water, sour milk,
and semen
named moving organisms
“animalcules”
“Father of Mic...
Studied cork - a
kind of tree bark
named the
structures he saw
“cells” because
they reminded him
of the small rooms
monks ...
Robert Brown (
Discovered “nucleus”
within the cells.
Scottish botanist
and palaeobotanist
Robert Brown
 French
 gave the term
“sarcode” for the
material inside
the cell, which is
now known as
“cytoplasm”
Robert Brown
Matthias Schleiden (1838)
• German Botanist
(plants)
• All plants looked
at were made of
cells, so
concluded:
“All plants ...
• German scientist
who studied animals
- zoologist
• Saw that all animals
he studied were
cellular so
concluded:
“All anim...
Rudolf Virchow (1855)
• German physician
who studied cell
reproduction
• “Where a cell exists,
there must have
been a pre-...
These scientists’
discoveries led to the cell
theory…
The Cell Theory has three parts:
 All Living things are made
up of cells.
 Cells are the basic unit of
life.
 Cells com...
With the invention of the microscope
and the contributions of many
scientists, a very important question
was answered in t...
Modern Cell Theory
Modern Cell Theory contains 4 statements, in addition to the
original Cell Theory:
 The cell contains ...
Evaluation
1. Who coined the term
“cell”?
a. Anton Van Leeuwenhoek
b. Robert Hooke
c. Matthias Schleiden
d. Theodor Schwann
2. Who said that plants are
made up of cells?
a. Anton Van Leeuwenhoek
b. Robert Hooke
c. Matthias Schleiden
d. Theodor Sc...
3. Who said that all animals
are made up of cells?
a. Anton Van Leeuwenhoek
b. Robert Hooke
c. Matthias Schleiden
d. Theod...
4. Who said that cells must
come from existing cells?
a. Rudolf Virchow
b. Robert Hooke
c. Matthias Schleiden
d. Theodor S...
5. Who used the first
microscope?
a. Anton Van Leeuwenhoek
b. Robert Hooke
c. Matthias Schleiden
d. Theodor Schwann
6-8. State the cell theory...
Answer Keys
1. Who coined the term
“cell”?
a. Anton Van Leeuwenhoek
b. Robert Hooke
c. Matthias Schleiden
d. Theodor Schwann
2. Who said that plants are
made up of cells?
a. Anton Van Leeuwenhoek
b. Robert Hooke
c. Matthias Schleiden
d. Theodor Sc...
3. Who said that all animals
are made up of cells?
a. Anton Van Leeuwenhoek
b. Robert Hooke
c. Matthias Schleiden
d. Theod...
4. Who said that cells must
come from existing cells?
a. Rudolf Virchow
b. Robert Hooke
c. Matthias Schleiden
d. Theodor S...
5. Who used the first
microscope?
a. Anton Van Leeuwenhoek
b. Robert Hooke
c. Matthias Schleiden
d. Theodor Schwann
6-8. State the cell theory...
 All Living things are
made up of cells.
 Cells are the basic unit of
life.
 Cells come f...
Assignment
1. What are the parts of a cell?
2. Describe and give their
function.
The End....
Demo cell theory
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Transcript of "Demo cell theory"

  1. 1. Cell Theory A Brief History Presented by: Fe Belen M. Samaniego
  2. 2. An introduction to cell theory...
  3. 3. History Cells were unknown until the discovery of microscopes in the 1650’s two scientists working independently built the first microscopes Anton Van Leeuwenhoek in Holland Robert Hooke in England
  4. 4. Dutch tradesman and scientist Studied pond water, sour milk, and semen named moving organisms “animalcules” “Father of Microbiology” Anton Van Leeuwenhoek (Early 1600’s)
  5. 5. Studied cork - a kind of tree bark named the structures he saw “cells” because they reminded him of the small rooms monks slept in. Robert Hooke (1665)
  6. 6. Robert Brown ( Discovered “nucleus” within the cells. Scottish botanist and palaeobotanist Robert Brown
  7. 7.  French  gave the term “sarcode” for the material inside the cell, which is now known as “cytoplasm” Robert Brown
  8. 8. Matthias Schleiden (1838) • German Botanist (plants) • All plants looked at were made of cells, so concluded: “All plants are made of cells.”
  9. 9. • German scientist who studied animals - zoologist • Saw that all animals he studied were cellular so concluded: “All animals are made of cells.” Theodore Schwann (1839)
  10. 10. Rudolf Virchow (1855) • German physician who studied cell reproduction • “Where a cell exists, there must have been a pre-existing cell…..”
  11. 11. These scientists’ discoveries led to the cell theory…
  12. 12. The Cell Theory has three parts:  All Living things are made up of cells.  Cells are the basic unit of life.  Cells come from pre- existing cells.
  13. 13. With the invention of the microscope and the contributions of many scientists, a very important question was answered in the 1850’s. The question was: Where do cells come from?
  14. 14. Modern Cell Theory Modern Cell Theory contains 4 statements, in addition to the original 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)
  15. 15. Evaluation
  16. 16. 1. Who coined the term “cell”? a. Anton Van Leeuwenhoek b. Robert Hooke c. Matthias Schleiden d. Theodor Schwann
  17. 17. 2. Who said that plants are made up of cells? a. Anton Van Leeuwenhoek b. Robert Hooke c. Matthias Schleiden d. Theodor Schwann
  18. 18. 3. Who said that all animals are made up of cells? a. Anton Van Leeuwenhoek b. Robert Hooke c. Matthias Schleiden d. Theodor Schwann
  19. 19. 4. Who said that cells must come from existing cells? a. Rudolf Virchow b. Robert Hooke c. Matthias Schleiden d. Theodor Schwann
  20. 20. 5. Who used the first microscope? a. Anton Van Leeuwenhoek b. Robert Hooke c. Matthias Schleiden d. Theodor Schwann
  21. 21. 6-8. State the cell theory...
  22. 22. Answer Keys
  23. 23. 1. Who coined the term “cell”? a. Anton Van Leeuwenhoek b. Robert Hooke c. Matthias Schleiden d. Theodor Schwann
  24. 24. 2. Who said that plants are made up of cells? a. Anton Van Leeuwenhoek b. Robert Hooke c. Matthias Schleiden d. Theodor Schwann
  25. 25. 3. Who said that all animals are made up of cells? a. Anton Van Leeuwenhoek b. Robert Hooke c. Matthias Schleiden d. Theodor Schwann
  26. 26. 4. Who said that cells must come from existing cells? a. Rudolf Virchow b. Robert Hooke c. Matthias Schleiden d. Theodor Schwann
  27. 27. 5. Who used the first microscope? a. Anton Van Leeuwenhoek b. Robert Hooke c. Matthias Schleiden d. Theodor Schwann
  28. 28. 6-8. State the cell theory...  All Living things are made up of cells.  Cells are the basic unit of life.  Cells come from pre- existing cells.
  29. 29. Assignment 1. What are the parts of a cell? 2. Describe and give their function.
  30. 30. The End....

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