Cytoskeleton

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This is my report in BIO 101. I took up BS Biology as my preparatory in medicine. Sorry for the lack of information. Have a nice day ahead. :)

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Cytoskeleton

  1. 1. The Cytoskeleton Shareeka Joana Ngilay
  2. 2. What is Cytoskeleton? Cytoplasm contains a complex network of filaments and microtubules which form a structural framework known as CYTOSKELETON.
  3. 3. Cells need (cyto) skeleton to: *create shape *change shape *allow movement Dynamic! Cytoskeleton: The skeleton and muscle of a cell
  4. 4. Three main kinds of fibers make up the CYTOSKELETON: ● MICROFILAMENT ● INTERMEDIATE FILAMENT ● MICROTUBULES
  5. 5. MICROFILAMENT ● Thinnest filament present in the cytoskeleton in cytoplasm of eukaryotic cell. ● Give the cell its shape and enable cell movement
  6. 6. MICROFILAMENT
  7. 7. FUNCTIONS OF MICROFILAMENT Microfilaments play a role in structure, cell motility, and cell division. Microfilaments are made of actin, and thus are involved in muscle contraction as well as cell division.
  8. 8. INTERMEDIATE FILAMENTS ● Made of variety of proteins, including keratin, desmin and vimentin ● 8 to 12 nanometer ● Composed of two anti parallel dimer
  9. 9. INTERMEDIATE FILAMENTS
  10. 10. FUNCTIONS OF INTERMEDIATE FILAMENT ● provide mechanical support for the plasma membrane where it comes into contact with other cells or with the extracellular matrix ● intermediate filaments do not participate in cell motility.
  11. 11. MICROTUBULES ● Microtubules, the thickest fibers, are hollow rods about 25 microns in diameter. ● Microtubule fibers are made up of the globular protein, tubulin, and they grow or shrink as more tubulin molecules are added or removed.
  12. 12. MICROTUBULES
  13. 13. Microtubules participate in the intracellular transport of organelles and vesicles. FUNCTIONS OF MICROTUBULES
  14. 14. Microtubules are the central structural supports in cilia and flagella. The locomotive appendages of cell
  15. 15. Cilia ● minute hairlike organelles, identical in structure to flagella, that line the surfaces of certaincells and beat in rhythmic waves, providing locomotion to ciliate protozoan a nd moving liquids along internal epithelial tissue in animals.
  16. 16. CILIA
  17. 17. FLAGELLA ● A slender threadlike structure, esp. a microscopic whiplike appendage that enables many protozoa, bacteria, spermatozoa, etc., to swim.
  18. 18. FLAGELLA
  19. 19. FLAGELLA
  20. 20. Thank you

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