The cytoskeleton is a network of filaments and microtubules that gives eukaryotic cells their shape and enables cell movement. It is composed of microfilaments, intermediate filaments, and microtubules. Microfilaments are made of actin and help with cell structure, motility, and division. Intermediate filaments provide mechanical support and do not participate in cell motility. Microtubules are made of tubulin and participate in intracellular transport and forming cilia and flagella, which enable cell movement.

1. The Cytoskeleton
Y.SHASHANK
17BCB015
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2. What is Cytoskeleton?
Cytoplasm contains a complex network of
filaments and microtubules which form a
structural framework known as
CYT0SKELETON.
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4. Cells need (cyto) skeleton to:
*create shape
*change shape
*allow movement
Cytoskeleton: The skeleton and muscle of a cell
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5. Three main kinds of fibers make up
the CYTOSKELETON:
● MICROFILAMENT
● INTERMEDIATE FILAMENT
● MICROTUBULES
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8. MICROFILAMENT
●Thinnest filament present in the cytoskeleton in
cytoplasm of eukaryotic cell.
●Give the cell its shape and enable cell movement
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11. 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.
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12. INTERMEDIATE FILAMENTS
● Made of variety of proteins,
including keratin, desmin and
vimentin
● 8to 12 nanometer
● Composed of two anti
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13. INTERMEDIATE FILAMENTS
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17. FUNCTIONS OF INTERMEDIATE FILAMENT
●provide mechanical support for
the plasma membranewhere it comes
into contact with other cells or with
the extracellular matrix
●intermediate filaments do not
participate in cell motility.
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18. 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.
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19. MICROTUBULES
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23. FUNCTIONS OFMICROTUBULES
Microtubules participate in theintracellular
transport of organelles andvesicles.
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25. Microtubules are the centralstructural
supports in cilia andflagella.
Thelocomotive appendages ofcell
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26. Cilia
●Minute hair like organelles, identical in structure
to flagella, that line the surfaces of certain cells and
beat in rhythmic waves, providing locomotion to
ciliate protozoan and moving liquids along internal
epithelial tissue in animals.
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27. CILIA
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30. FLAGELLA
●A slender threadlike structure, esp. a microscopic
whip like appendage that enables many protozoa,
bacteria, spermatozoa, etc., to swim.
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31. FLAGELLA
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32. FLAGELLA
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34. Thankyou….
-Y . Shashank
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