Copy; keynote; ch. 3; cell structure & function copy.ppsx

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Copy; keynote; ch. 3; cell structure & function copy.ppsx

  1. 1. Cell Structure & Function<br />http://koning.ecsu.ctstateu.edu/cell/cell.html<br />
  2. 2. Cell Theory<br />All living things are made up of cells. <br />Cells are the smallest working units of all living things. <br />All cells come from preexisting cells through cell division. <br />
  3. 3.
  4. 4.
  5. 5. Definition of Cell<br />A cell is the smallest unit of life that is capable of performing life’s functions of reproducing and getting food.<br />
  6. 6. Examples of Cells<br />Amoeba Proteus<br />Plant Stem<br />Bacteria<br />Red Blood Cell<br />Nerve Cell<br />
  7. 7. Two Types of Cells<br /><ul><li>Prokaryotic
  8. 8. Eukaryotic</li></li></ul><li>Prokaryotic<br />Do not have structures surrounded by membranes<br />Few internal structures<br />One-celled organisms, Bacteria <br />http://library.thinkquest.org/C004535/prokaryotic_cells.html<br />
  9. 9. Eukaryotic<br />Contain organelles surrounded by membranes<br />Most living organisms<br />Plant<br />Animal<br />http://library.thinkquest.org/C004535/eukaryotic_cells.html<br />
  10. 10. “Typical” Animal Cell<br />http://web.jjay.cuny.edu/~acarpi/NSC/images/cell.gif<br />
  11. 11. http://waynesword.palomar.edu/images/plant3.gif<br />“Typical” Plant Cell<br />
  12. 12. Cell Parts<br />Organelles<br />
  13. 13. Surrounding the Cell<br />
  14. 14. Cell Membrane<br />Outer membrane of cell that controls movement in and out of the cell<br />Double layer <br />http://library.thinkquest.org/12413/structures.html<br />
  15. 15. Cell Wall<br />Most commonly found in plant cells & bacteria<br />Supports & protects cells<br />http://library.thinkquest.org/12413/structures.html<br />
  16. 16. Inside the Cell<br />
  17. 17. Nucleus<br />Directs cell activities<br />Separated from cytoplasm by nuclear membrane<br />Contains genetic material - DNA<br />
  18. 18. Nuclear Membrane<br />Surrounds nucleus<br />Made of two layers<br />Openings allow material to enter and leave nucleus <br />http://library.thinkquest.org/12413/structures.html<br />
  19. 19. Chromosomes<br />In nucleus<br />Made of DNA<br />Contain instructions for traits & characteristics <br />http://library.thinkquest.org/12413/structures.html<br />
  20. 20. Nucleolus<br />Inside nucleus<br />Contains RNA to build proteins <br />http://library.thinkquest.org/12413/structures.html<br />
  21. 21. Cytoplasm<br />Gel-like mixture<br />Surrounded by cell membrane<br />Contains hereditary material <br />
  22. 22. Endoplasmic Reticulum<br />Moves materials around in cell<br />Smooth type: lacks ribosomes<br />Rough type (pictured): ribosomes embedded in surface <br />http://library.thinkquest.org/12413/structures.html<br />
  23. 23. Ribosomes<br />Each cell contains thousands<br />Make proteins<br />Found on ribosomes & floating throughout the cell<br />http://library.thinkquest.org/12413/structures.html<br />
  24. 24. Mitochondria<br />Produces energy through chemical reactions – breaking down fats & carbohydrates<br />Controls level of water and other materials in cell<br />Recycles and decomposes proteins, fats, and carbohydrates<br />http://library.thinkquest.org/12413/structures.html<br />
  25. 25. Golgi Bodies<br />Protein 'packaging plant'<br />Move materials within the cell<br />Move materials out of the cell<br />http://library.thinkquest.org/12413/structures.html<br />
  26. 26. Lysosome<br />Digestive 'plant' for proteins, fats, and carbohydrates<br />Transports undigested material to cell membrane for removal<br />Cell breaks down if lysosome explodes <br />http://library.thinkquest.org/12413/structures.html<br />
  27. 27. Vacuoles<br />Membrane-bound sacs for storage, digestion, and waste removal<br />Contains water solution<br />Help plants maintain shape<br />http://library.thinkquest.org/12413/structures.html<br />
  28. 28. Chloroplast<br />Usually found in plant cells<br />Contains green chlorophyll<br />Where photosynthesis takes place<br />http://library.thinkquest.org/12413/structures.html<br />

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