Cell the basic unit of life
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The document discusses the history and discovery of cells, highlighting key scientists such as Robert Hooke and Robert Brown, who contributed to the understanding of cell structure. It outlines the modern cell theory, detailing that the cell is the fundamental unit of life, composed of plasma membrane, nucleus, and cytoplasm. The text also distinguishes between prokaryotic and eukaryotic cells, explaining their respective components and functions.
Cell the basic unit of life
- 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
- 39. Cell Organelle – Golgi apparatus
- 47. Diversity in Cells of a
- 54. Diversity in Cells size
- 55. Diversity in Cells size
- 56. Diversity in Cells size
- 57. Microscope
- 58. Microscope
- 60. Measure
- 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