Cell The structural and functional unit of life. A lesson for std VIII Biology AP State Cell Diversity Types of cells Microscope structure, cell organelle differences of plant and animal cells prokaryotic and eukaryotic cells cell theory, scientists worked for invention of cell

1. Cell: The unit of life.

2. Before the first
microscope was
invented around 360
years ago, People
were not aware of
living world that was
not visible to the
naked eye.

3. Many Scientists
were observing and
describing
unknown world
with the help of
Microscopes

4. Among them the
most important
scientists
mentioned are. . .
Athanasius Kircher
1601-1680

5. Zacharias Janssen
Among them the
most important
scientists
mentioned are. . .

6. Among them the
most important
scientists
mentioned are. . .
Jan Swammerdam
1637-1680

7. Among them the
most important
scientists
mentioned are. . .
Anthony Van
Leeuwenhoek
1632-1723

8. Among them the
most important
scientists
mentioned are. . .
Robert Hooke
1635-1702

9. Among them the
most important
scientists
mentioned are. . .
Robert Brown
1773-1858

10. Felice Fontana
1730-1805
Among them the
most important
scientists
mentioned are. . .

11. Discovery of the cell
Robert Hooke in the
year 1665 observed
thin slices of cork
under a simple
magnifying device
he designed.

12. Discovery of the cell
He observed that
the cork
resembled the
structure of
honey comb
consisting many
empty box like
cavities - Cells.

13. A significant observation
In 1831 Robert
Brown noticed a
near- circular spot
slightly more
opaque than the
surrounding
areas.

14. A significant observation
Robert Brown claimed that this
structure was an integral part of
the cell and called nucleus.

15. The Modern Cell Theory
consists of three
statements based on
large body of scientific
research. The orginal
work was done by
Schleiden, Schwan and
Virchow

16. 1. The cell is the fundamental unit of
structure and function in living things.
2. All living things are composed of cells.
3. Cells come from pre existing cells.

17. Cell is a functional
and Structural
Unit of Life
Each cell is a membrane bound
body that contain all chemical
molecules that help support
organisms life.

18. Cell is composed of
various parts.
Cell is made up of 3
basic components
1. Plasma membrane
2. Nucleus
3. Cytoplasm.

19. Plasma membrane is
the outer most covering
of the cell separates it
contents from external
environment.
Plasma membrane is
semi permeable
membrane and made up
of fats and proteins.

20. Nucleus is the control
centre of the cell and
has a double layered
covering called nuclear
membrane
Nucleus contains
genetic material
(Chromosomes)
Which will have DNA

22. * Nucleus
* Membrane bound organelle
* Cytoskeleton
* Complex
* No Nucleus
* No Membrane bound Organelle
* No Cytoskeleton
* Simple
. Cytoplasm
• DNA
• Plasma
Membrane
Eukaryotic Cell Prokaryotic Cell

23. Cytoplasm is the fluid
substance that fill the
cell and contain various
organelle for various
functions.

24. There are cells without
nucleus they are called
Prokaryotic cells. They
do have Nucleoid

25. Cells with prominent
nucleus are called
Eukaryotic cells.

26. 0.1 -10 micro metes 10 -100 micro metes

30. Paramecium

31. Vacuole
Chloroplast
Flagellum
Cellulose wall
Eye spot
Starch storage
Chlamydomonas

37. Cell Organelle is a
specialised
membrane bound
structure with in a
eukaryotic cell which
perform specific task

38. Cell Organelle –
Endoplasmic
Reticulum

39. Cell Organelle –
Golgi apparatus

40. Cell Organelle –
Mitochondrion

41. Cell Organelle –
Chloroplast

42. Cell Organelle –
Lysosome

43. Cell Organelle –
Ribosome

44. Cell Organelle –
Vacuole

45. Diversity in Cells

46. Diversity in Size

47. Diversity in Cells of a

48. Diversity in Cells

49. Diversity in Cells

50. Diversity in Cells

51. Diversity in Cells

52. Diversity in Cells

53. Diversity in Cells

54. Diversity in Cells size

55. Diversity in Cells size

56. Diversity in Cells size

57. Microscope

58. Microscope

60. Measure

61. International
System Ruler

63. Exercise- Identify the parts

64. Exercise- Identify the parts

65. Exercise- Identify the parts

66. Exercise- Identify the parts

68. Exercise- Identify the parts