Cell structure function

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Cell structure function

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

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