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Cell Discovery & Cell
       Theory
Presented by: Joevani S. Peñol
What is a Cell?
Cell
• The structural and
  functional unit of all
  living organism.
History
• The study of cells started about three hundred
  years ago.
• With the help of one powerful instrument the
  cell was begin to be known to humans.
Cell Discovery
• The scientist who have contributed to the
  discovery of the cell:
 Hans and Zacharias Jansen
Robert Hooke
Matthias Schleiden
Theodor Schwann
Robert Brown
Anton van
 Leeuwenhoek
Rudolph Virchow
Cell discovery & cell theory
1595
• Hans and Zacharias
  Jansen

Credited for the
  production of lenses.
Cell discovery & cell theory
1665
       • Robert Hooke
       English Scientist.
         Coined the term
         “CELL”
       He found it in a cork.
       Inventor of the
         compound
         microscope.
Cork   Oak Tree
Cell Wall of a
  Cork Cell
1674
• Anton van Leeuwenhoek
Dutch Businessman.
Described cells in a drop of pond water that he
  called “animalcules”.
“Father of Ancient
Microbiology”
1833
• Robert Brown
English botanist,
  discovered the
  nucleus in plant
  cells(orchid).
Plant Cells
1838
  • Matthias Jakob
    Schleiden
  German
    botanist, conclud
    ed the all plant
    tissues are
    composed of
    cells.
1839
• Theodor Schwann
German zoologist,
  concluded that all
  animal tissues are
  composed of
  cells.
Proposed the cell
  theory
1858
• Rudolph Virchow
Completed the cell theory by expounding
  his famous conclusion “omnis cellula e
  cellula” or cells develop from pre-
  existing cells.
Cell Theory According to Schwann
1) The cell is the unit of structure,
  physiology, and organization in living
  things.
2) The cell retains a dual existence as
  a distinct entity and a building block
  in the construction of organisms.
Continued…
3) Cells form by free-cell formation,
  similar to the formation of crystals
  (spontaneous generation).
Spontaneous Generation
The hypothetical process by which living
  organisms develop from nonliving matter.
Francesco Redi
Redi’s Experiment the Disprove
  Spontaneous Generation
Revised Cell Theory

1. all known living things are made up of cells.

2. the cell is structural & functional unit of all living
  things.

3. all cells come from pre-existing cells by division.
  (Spontaneous Generation does not occur).
References
• http://www.ncbi.nlm.nih.gov/pmc/articles/P
  MC2603088/
• http://www.bio.miami.edu/~cmallery/150/uni
  ty/cell.text.htm
• http://teachertech.rice.edu/Participants/daws
  onm/cells/timeline.htm
QUIZ
Multiple Choice
Direction: Write the CAPITAL LETTER of
  the correct answer on your paper.
1. What is the structural and functional
  unit of all living organism?
A. Tissue
B. Cell
C. Organ
D. Organ System
2. Who was the German Physiologist who
  completed the Cell Theory?

A. Theodor Schwann
B. Matthias Schleiden
C. Rudolph Virchow
D. Robert Hooke
3. Who was the German Botanist who
  stated that all plants are made up cells?

A. Theodor Schwann
B. Matthias Schleiden
C. Anton van Leeuwenhoek
D. Robert Brown
4. Who discovered the nucleus of the
  cell?

A. Robert Hooke
B. Robert Brown
C. Rudolph Virchow
D. Hans and Zacharias Jansen
5. He falsified the spontaneous
  generation

A. Theodor Schwann
B. Francesco Redi
C. Anton van Leeuwenhoek
D. Robert Hooke
6. He used his simple microscope in
  observing cells from a drop of pond
  water that he called “animalcules”

A. Hans and Zacharias Jansen
B. Theodor Schwann
C. Anton van Leeuwenhoek
D. Rudolph Virchow
7. He is a German Zoologist who stated
  that all animals are composed of cells

A. Matthias Schleiden
B. Theodor Schwann
C. Robert Brown
D. Robert Hooke
II. Enumeration

• 8-10 State the Cell Theory

8.
9.
10.
Cell discovery & cell theory
1. What is the structural and functional
  unit of all living organism?
A. Tissue


                             B
B. Cell
C. Organ
D. Organ System
2. Who was the German Physiologist who
  completed the Cell Theory?

A. Theodor Schwann


                           C
B. Matthias Schleiden
C. Rudolph Virchow
D. Robert Hooke
3. Who was the German Botanist who
  stated that all plants are made up cells?

A. Theodor Schwann


                              B
B. Matthias Schleiden
C. Anton van Leeuwenhoek
D. Robert Brown
4. Who discovered the nucleus of the
  cell?



                           B
A. Robert Hooke
B. Robert Brown
C. Rudolph Virchow
D. Hans and Zacharias Jansen
5. They/He first constructed a compound
  microscope

A. Theodor Schwann


                           B
B. Hans and Zacharias
C. Anton van Leeuwenhoek
D. Robert Hooke
6. He used his simple microscope in
  observing cells from a drop of pond
  water that he called “animalcules”

A. Hans and Zacharias Jansen
B. Theodor Schwann
C. Anton van Leeuwenhoek       C
D. Rudolph Virchow
7. He is a German Zoologist who stated
  that all animals are composed of cells

A. Matthias Schleiden


                             B
B. Theodor Schwann
C. Robert Brown
D. Robert Hooke
• 8-10 State the Cell Theory

8. all known living things are made up of
  cells.
9. the cell is structural & functional unit
  of all living things.
10. all cells come from pre-existing cells
  by division.

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Cell discovery & cell theory

  • 1. Cell Discovery & Cell Theory Presented by: Joevani S. Peñol
  • 2. What is a Cell?
  • 3. Cell • The structural and functional unit of all living organism.
  • 4. History • The study of cells started about three hundred years ago. • With the help of one powerful instrument the cell was begin to be known to humans.
  • 5. Cell Discovery • The scientist who have contributed to the discovery of the cell:  Hans and Zacharias Jansen Robert Hooke Matthias Schleiden Theodor Schwann Robert Brown
  • 8. 1595 • Hans and Zacharias Jansen Credited for the production of lenses.
  • 10. 1665 • Robert Hooke English Scientist. Coined the term “CELL” He found it in a cork. Inventor of the compound microscope.
  • 11. Cork Oak Tree
  • 12. Cell Wall of a Cork Cell
  • 13. 1674 • Anton van Leeuwenhoek Dutch Businessman. Described cells in a drop of pond water that he called “animalcules”. “Father of Ancient Microbiology”
  • 14. 1833 • Robert Brown English botanist, discovered the nucleus in plant cells(orchid).
  • 16. 1838 • Matthias Jakob Schleiden German botanist, conclud ed the all plant tissues are composed of cells.
  • 17. 1839 • Theodor Schwann German zoologist, concluded that all animal tissues are composed of cells. Proposed the cell theory
  • 18. 1858 • Rudolph Virchow Completed the cell theory by expounding his famous conclusion “omnis cellula e cellula” or cells develop from pre- existing cells.
  • 19. Cell Theory According to Schwann 1) The cell is the unit of structure, physiology, and organization in living things. 2) The cell retains a dual existence as a distinct entity and a building block in the construction of organisms.
  • 20. Continued… 3) Cells form by free-cell formation, similar to the formation of crystals (spontaneous generation).
  • 21. Spontaneous Generation The hypothetical process by which living organisms develop from nonliving matter.
  • 23. Redi’s Experiment the Disprove Spontaneous Generation
  • 24. Revised Cell Theory 1. all known living things are made up of cells. 2. the cell is structural & functional unit of all living things. 3. all cells come from pre-existing cells by division. (Spontaneous Generation does not occur).
  • 25. References • http://www.ncbi.nlm.nih.gov/pmc/articles/P MC2603088/ • http://www.bio.miami.edu/~cmallery/150/uni ty/cell.text.htm • http://teachertech.rice.edu/Participants/daws onm/cells/timeline.htm
  • 26. QUIZ
  • 27. Multiple Choice Direction: Write the CAPITAL LETTER of the correct answer on your paper. 1. What is the structural and functional unit of all living organism? A. Tissue B. Cell C. Organ D. Organ System
  • 28. 2. Who was the German Physiologist who completed the Cell Theory? A. Theodor Schwann B. Matthias Schleiden C. Rudolph Virchow D. Robert Hooke
  • 29. 3. Who was the German Botanist who stated that all plants are made up cells? A. Theodor Schwann B. Matthias Schleiden C. Anton van Leeuwenhoek D. Robert Brown
  • 30. 4. Who discovered the nucleus of the cell? A. Robert Hooke B. Robert Brown C. Rudolph Virchow D. Hans and Zacharias Jansen
  • 31. 5. He falsified the spontaneous generation A. Theodor Schwann B. Francesco Redi C. Anton van Leeuwenhoek D. Robert Hooke
  • 32. 6. He used his simple microscope in observing cells from a drop of pond water that he called “animalcules” A. Hans and Zacharias Jansen B. Theodor Schwann C. Anton van Leeuwenhoek D. Rudolph Virchow
  • 33. 7. He is a German Zoologist who stated that all animals are composed of cells A. Matthias Schleiden B. Theodor Schwann C. Robert Brown D. Robert Hooke
  • 34. II. Enumeration • 8-10 State the Cell Theory 8. 9. 10.
  • 36. 1. What is the structural and functional unit of all living organism? A. Tissue B B. Cell C. Organ D. Organ System
  • 37. 2. Who was the German Physiologist who completed the Cell Theory? A. Theodor Schwann C B. Matthias Schleiden C. Rudolph Virchow D. Robert Hooke
  • 38. 3. Who was the German Botanist who stated that all plants are made up cells? A. Theodor Schwann B B. Matthias Schleiden C. Anton van Leeuwenhoek D. Robert Brown
  • 39. 4. Who discovered the nucleus of the cell? B A. Robert Hooke B. Robert Brown C. Rudolph Virchow D. Hans and Zacharias Jansen
  • 40. 5. They/He first constructed a compound microscope A. Theodor Schwann B B. Hans and Zacharias C. Anton van Leeuwenhoek D. Robert Hooke
  • 41. 6. He used his simple microscope in observing cells from a drop of pond water that he called “animalcules” A. Hans and Zacharias Jansen B. Theodor Schwann C. Anton van Leeuwenhoek C D. Rudolph Virchow
  • 42. 7. He is a German Zoologist who stated that all animals are composed of cells A. Matthias Schleiden B B. Theodor Schwann C. Robert Brown D. Robert Hooke
  • 43. • 8-10 State the Cell Theory 8. all known living things are made up of cells. 9. the cell is structural & functional unit of all living things. 10. all cells come from pre-existing cells by division.