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

6. Anton van Leeuwenhoek Rudolph Virchow

7. Chronological Arrangement of Scientist and their Contributions

8. 1595 Hans and Zacharias Jansen Credited for the production of lenses.

9. 1665 Robert Hooke English Scientist. Coined the term “CELL” He found it in a cork. Inventor of the compound microscope.

10. Cork Oak Tree

11. Cell Wall of a Cork Cell

12. 1674 Anton van Leeuwenhoek Dutch Businessman. Described cells in a drop of pond water that he called “animalcules”. “Father of Ancient Microbiology”

13. 1833 Robert Brown English botanist, discovered the nucleus in plant cells(orchid).

14. Plant Cells

15. 1838 Matthias Jakob Schleiden German botanist, concluded the all plant tissues are composed of cells.

16. 1839 Theodor Schwann German zoologist, concluded that all animal tissues are composed of cells. Proposed the cell theory

17. 1858 Rudolph Virchow Completed the cell theory by expounding his famous conclusion “ omnis cellula e cellula ” or cells develop from pre-existing cells.

18. 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.     

19. Continued… 3)  Cells form by free-cell formation, similar to the formation of crystals (spontaneous generation).

20. Spontaneous Generation The hypothetical process by which living organisms develop from nonliving matter.

21. Francesco Redi

22. Redi’s Experiment the Disprove Spontaneous Generation

23. 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). 

24. References http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2603088/ http://www.bio.miami.edu/~ cmallery/150/unity/cell.text.htm http:// teachertech.rice.edu/Participants/dawsonm/cells/timeline.htm

25. QUIZ

26. 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? Tissue Cell Organ Organ System

27. 2. Who was the German Physiologist who completed the Cell Theory? Theodor Schwann Matthias Schleiden Rudolph Virchow Robert Hooke

28. 3. Who was the German Botanist who stated that all plants are made up cells ? Theodor Schwann Matthias Schleiden Anton van Leeuwenhoek Robert Brown

29. 4. Who discovered the nucleus of the cell ? Robert Hooke Robert Brown Rudolph Virchow Hans and Zacharias Jansen

30. 5. He falsified the spontaneous generation Theodor Schwann Francesco Redi Anton van Leeuwenhoek Robert Hooke

31. 6. He used his simple microscope in observing cells from a drop of pond water that he called “animalcules ” Hans and Zacharias Jansen Theodor Schwann Anton van Leeuwenhoek Rudolph Virchow

32. 7. He is a German Zoologist who stated that all animals are composed of cells Matthias Schleiden Theodor Schwann Robert Brown Robert Hooke

33. II. Enumeration 8-10 State the Cell Theory 8. 9. 10.

34. ANSWERS!!!

35. 1. What is the structural and functional unit of all living organism? Tissue Cell Organ Organ System B

36. 2. Who was the German Physiologist who completed the Cell Theory? Theodor Schwann Matthias Schleiden Rudolph Virchow Robert Hooke C

37. 3. Who was the German Botanist who stated that all plants are made up cells? Theodor Schwann Matthias Schleiden Anton van Leeuwenhoek Robert Brown B

38. 4. Who discovered the nucleus of the cell? Robert Hooke Robert Brown Rudolph Virchow Hans and Zacharias Jansen B

39. 5. They/He first constructed a compound microscope Theodor Schwann Hans and Zacharias Anton van Leeuwenhoek Robert Hooke B

40. 6. He used his simple microscope in observing cells from a drop of pond water that he called “animalcules” Hans and Zacharias Jansen Theodor Schwann Anton van Leeuwenhoek Rudolph Virchow C

41. 7. He is a German Zoologist who stated that all animals are composed of cells Matthias Schleiden Theodor Schwann Robert Brown Robert Hooke B

42. 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.