Presentation 1 cell structure and function

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Presentation 1 cell structure and function

  1. 1. Cell Structure and Function
  2. 2. Cell Theory <ul><li>All living things are made up of cells. </li></ul><ul><li>Cells are the smallest working units of all living things. </li></ul><ul><li>All cells come from preexisting cells through cell division. </li></ul>
  3. 3. Definition of Cell A cell is the smallest unit that is capable of performing life functions.
  4. 4. Examples of Cells Amoeba Proteus Plant Stem Red Blood Cell Nerve Cell Bacteria
  5. 5. Two Types of Cells <ul><li>Prokaryotic </li></ul><ul><li>Eukaryotic </li></ul>
  6. 6. Prokaryotic cell <ul><li>Do not have internal structures surrounded by membranes </li></ul><ul><li>Few internal structures </li></ul><ul><li>One-celled organisms, Bacteria </li></ul>
  7. 7. Prokaryotic cell
  8. 8. Eukaryotic cells Plant cell Animal cell <ul><li>Contain organelles surrounded by membranes </li></ul><ul><li>Most living organisms </li></ul>
  9. 9. Eukaryotic cells Plant cells (onion cells) Animal cell (Amoeba)
  10. 10. Organelles
  11. 11. Cell Membrane <ul><li>Outer membrane of cell that controls movement in and out of the cell </li></ul><ul><li>Double layer </li></ul>http://library.thinkquest.org/12413/structures.html
  12. 12. Cell Wall <ul><li>Most commonly found in plant cells & bacteria </li></ul><ul><li>Supports & protects cells </li></ul>
  13. 13. Nucleus <ul><li>Directs cell activities </li></ul><ul><li>Separated from cytoplasm by nuclear membrane </li></ul><ul><li>Contains genetic material - DNA </li></ul>
  14. 14. Nucleus
  15. 15. Cytoplasm <ul><li>Gel-like mixture </li></ul><ul><li>Surrounded by cell membrane </li></ul><ul><li>Contains all the organelles </li></ul><ul><li>In it, all the chemical reactions occur. </li></ul>
  16. 16. Ribosomes <ul><li>Each cell contains thousands </li></ul><ul><li>Make proteins </li></ul><ul><li>Found on rough endoplasmic reticulum & floating throughout the cell </li></ul>
  17. 17. Endoplasmic reticulum <ul><li>Moves materials around in cell: </li></ul><ul><li>Lipids and carbohydrates in smooth type </li></ul><ul><li>Proteins in rough type </li></ul>
  18. 18. Golgi apparatus <ul><li>Protein 'packaging plant' </li></ul><ul><li>Move materials within the cell and out of the cell by using vesicles </li></ul>
  19. 19. RE and Golgi apparatus
  20. 20. Vacuole <ul><li>Membrane-bound sacs for storage, digestion, and waste removal </li></ul><ul><li>Help plants maintain shape </li></ul>
  21. 21. Lysosome <ul><li>Contains digestive enzymes for proteins, fats, and carbohydrates </li></ul><ul><li>Transports undigested material to cell membrane for removal </li></ul><ul><li>Cell breaks down if lysosome explodes </li></ul>
  22. 22. Mitochondrion <ul><li>Produces energy through chemical reactions – breaking down fats & carbohydrate </li></ul>
  23. 23. Chloroplast <ul><li>Contains green chlorophyll </li></ul><ul><li>Where photosynthesis takes place </li></ul>
  24. 24. Centrioles <ul><li>Lead cromosomes movement during cell division </li></ul><ul><li>Control flagella and cilia vibration </li></ul>
  25. 25. Cytoskeleton <ul><li>Support organelles and cell shape and place a role in cell motion </li></ul>
  26. 26. Flagellum and cillia Help cell move

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