World of Cells

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World of Cells

  1. 1. A View of the Cell Free powerpoints at http://www.worldofteaching.com
  2. 2. <ul><li>Cell </li></ul><ul><li>Tissue – group of cells functioning together. </li></ul><ul><li>Organ – group of tissues functioning together. </li></ul><ul><li>Organ System – group of organs functioning together. </li></ul><ul><li>Organism – group of organ systems functioning together. </li></ul>
  3. 3. <ul><li>The Cell </li></ul><ul><ul><li>The basic unit of an organism </li></ul></ul><ul><ul><li>Discovery made possible by the invention of the microscope </li></ul></ul>
  4. 4. <ul><li>1600’s. </li></ul><ul><ul><li>Anton van Leeuwenhoek first described living cells as seen through a simple microscope. </li></ul></ul>
  5. 5. <ul><ul><li>Robert Hooke used the first compound microscope to view thinly sliced cork cells. </li></ul></ul><ul><ul><ul><li>Compound scopes use a series of lenses to magnify in steps. </li></ul></ul></ul><ul><ul><ul><li>Hooke was the first to use the term “cell”. </li></ul></ul></ul>
  6. 6. <ul><li>1830’s. </li></ul><ul><ul><li>Mathias Schleiden identified the first plant cells and concluded that all plants </li></ul></ul><ul><ul><li>made of cells. </li></ul></ul><ul><ul><li>- Thomas Schwann made the same conclusion about animal cells. </li></ul></ul>
  7. 7. <ul><li>All organisms are made up of one or more cells. </li></ul><ul><li>The cell is the basic unit of organization of all organisms. </li></ul><ul><li>All cells come from other cells all ready in existence. </li></ul>
  8. 8. <ul><ul><li>A) Cell Membrane </li></ul></ul><ul><ul><ul><li>-- Serves as a boundary between the cell and its external environment. </li></ul></ul></ul><ul><ul><ul><li>-- Allows selected materials to pass in and out of the cell. </li></ul></ul></ul>
  9. 9. <ul><ul><li>B) Cell Wall </li></ul></ul><ul><ul><ul><li>-- Surrounds the cell membrane of the cells of plants, bacteria, and fungi. </li></ul></ul></ul><ul><ul><ul><li>-- Allows all materials to move in and out of the cell </li></ul></ul></ul><ul><ul><ul><li>-- Plant cell walls contain cellulose while fungi cell walls contain chitin. </li></ul></ul></ul><ul><ul><ul><li>-- Gives the cell the fixed shape. </li></ul></ul></ul>
  10. 10. <ul><ul><li>Nucleus </li></ul></ul><ul><ul><ul><li>Controls all cell functions within the cell. </li></ul></ul></ul><ul><ul><ul><li>Contains genetic materials (DNA) which can be passed from one generation to the next. </li></ul></ul></ul>
  11. 11. <ul><ul><li>Cytoplasm </li></ul></ul><ul><ul><ul><li>The jelly-like material that surrounds the all the cell parts in the cell. </li></ul></ul></ul><ul><ul><ul><li>Where many of the cell substances are made. </li></ul></ul></ul>
  12. 12. <ul><ul><li>Chloroplasts </li></ul></ul><ul><ul><ul><li>-- Found in plant cells. </li></ul></ul></ul><ul><ul><ul><li>-- Transforms light energy into chemical energy which is stored in food molecules. </li></ul></ul></ul><ul><ul><ul><li>-- Contain chlorophyll – a green pigment that traps light energy and gives plants their green color. </li></ul></ul></ul>

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