By: Marina Járboles, Cristina Alierta and Pilar Ballesteros. CELL Cell Theory Cell scientists 1) Robert Hooke 2) Antony Van Leeuwenhoek 3) Robert Brown 4) Mattias Schleiden 5) Theodor Schwann 6) Rudolph Virchow History of microscopes Types of microscopes Optical and electron microscopes.

1. The cell theory and the
microscopes
By: Marina Járboles, Cristina
Alierta and Pilar Ballesteros.

2. The cell theory

3. The cell theory
• Formulated by:
• Other scientists that contributed:

4. The cell theory
• It states that:
• 1) All living things are made up of cells.

5. • 2) Cells are the basic structural and
functional unit of life.

6. • A good example will be this dog:

7. • 3) Cells come from pre-existing cells by
division.

8. New statements:
• 4) Energy flow occurs within cells.
Reaction of cellular respiration

9. • 5) Hereditary information (DNA) is passed
on from cell to cell.

10. • Eukaryotic cells division
• Prokaryotic cells division:

11. • 6) All cells have the same basic chemical
composition.

12. Activity
• Say which of this statements belong to the
original theory and which ones are new:
• Cells come from pre-existing cells by division.
• All cells have the same basic chemical
composition.
• Hereditary information (DNA) is passed on from
cell to cell.
• All living things are made up of cells.
• Cells are the basic structural and functional unit
of life.
• Energy flow occurs within cells.

13. Answer
• Original theory:
• Cells come from pre-existing cells by division.
• All living things are made up of cells.
• Cells are the basic structural and functional unit of life.
• New statements:
• Energy flow occurs within cells.
• All cells have the same basic chemical composition.
• Hereditary information (DNA) is passed on from cell to
cell.

14. Important scientists in cell
theory
• 1) Robert Hooke
• 2) Antony Van Leeuwenhoek
• 3) Robert Brown
• 4) Mattias Schleiden
• 5) Theodor Schwann
• 6) Rudolph Virchow

15. 1. Robert Hooke
• 1635-1703

16. • In 1665 he published “Micrographia”

17. •The first to identify and name a cell

18. 2. Antony Van Leeuwenhoek
• 1632-1723
• Made better lenses

19. Red blood cells as he saw them
White blood cell
•The first to observe a living cell

20. Bacteria in his saliva
Dog sperm Human sperm

21. 3. Robert Brown
• 1773-1857
• He discovered the nucleus of cells

22. 4. Mattias Schleiden
• 1804-1881
• First to note that all plants were made up
of cells

23. 5. Theodor Schwann
• 1810-1882
• Concluded that all living things were made
up of cells

24. 6. Rudolph Virchow
• 1821- 1902
• Proposed that cells come from other cells

25. Cell theory
• 1. All living things are made up of cells.
• 2. Cells are the basic structural and
functional unit of life.
• 3. Cells come from pre-existing cells by
division.

26. • This is how an eukaryotic animal cell
would look like:

27. Activity
• Say the name of the scientists who
contributed with the cell theory in order

28. Answer
• 1. Hooke
• 2. Van Leeuwenhoek
• 3. Brown
• 4. Schleiden
• 5. Schwann
• 6. Virchow

29. Major contibutions to the
cell theory
• Say how do you think each scientist contributed
to the creation of the cell theory:
• Hooke
• Van Leeuwenhoek
• Brown
• Schleiden
• Schwann
• Virchow

30. Major contibutions to the cell theory
• Hooke: The first to identify and name a cell
• Van Leeuwenhoek: Made better lenses and was
the first to observe a living cell
• Brown: He discovered the nucleus of cells
• Schleiden: First to note that all plants were made
up of cells
• Schwann: Concluded that all living things were
made up of cells
• Virchow: Proposed that cells come from other
cells

31. The microscopes

32. Definition

33. History of microscopes
• 1st century AD
• Magnifiers

34. • 1590’s
• Zacharias Janssen and his father Hans

35. • Antony Van Leeuwenhoek

36. • Hooke

37. True or false
• Hooke was the first man to make a real
microscope
• Hooke was the first man to use a three-
lens configuration in a microscope
• There are still some Jansen’s
microscopes
• Romans invented microscopes

38. • Hooke was the first man to make a real
microscope: False
• Hooke was the first man to use a three-
lens configuration in a microscope: True
• There are still some Jansen’s
microscopes: False
• Romans invented microscopes: False

39. Types of microscopes

40. 1. Optical microscopes
• 1.1 Compound microscope
• 1.2 Stereo microscope
• 1.3 Confocal microscope

41. 1.1 Compound microscope
Fresh water shrimp, Gammarus

42. 1.2 Stereo microscope
Cell division in a frog’s egg

43. 1.3 Confocal microscope
Aquatic worm

44. Activity
• Join the microscope name with its picture
Confocal microscope
Stereo microscope
Compound microscope

45. Answer
Confocal microscope
Stereo microscope
Compound microscope

46. 2. Electron microscopes
2.1 Transmission Microscope
2.2 Scanning Electron Microscope
2.3 Reflection Electron Microscope

47. 2.1 Transmission electron
Microscope
Lung tissue

48. 2.2 Scanning Electron
Microscope
Pollen

49. Activity
• Join the microscope name and the image
you can see through it
Scanning electron microscope
Transmission electron microscope

50. Answer
Scanning electron microscope
Transmission electron microscope

51. 2.3 Reflection Electron
Microscope
• 2.3.1 X-ray Microscope
• 2.3.2 Scanning Helium Ion Microscope
• 2.3.3 Scanning acoustic microscope
• 2.3.4 Scanning Probe Microscopes

52. 2.3.1 X-ray Microscope
Bacteria

53. 2.3.2 Scanning Helium Ion
Microscope

54. 2.3.3 Scanning acoustic
microscope
Lymph node

55. 2.3.4 Scanning Probe
Microscopes
Purple membrane

56. Activity
• Join the microscope name with its picture
• X-ray Microscope
• Scanning Helium Ion Microscope
• Scanning acoustic microscope
• Scanning Probe Microscopes

57. Answer
• Join the microscope name with its picture
• X-ray Microscope
• Scanning Helium Ion Microscope
• Scanning acoustic microscope
• Scanning Probe Microscopes

58. • Now lets see if you can solve this
crossword:

59. • Finally lets see if you remember some of
the microscope parts:

60. The end