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Cell Wall & Plasmodesmata Biology 4 Honors Robyn Ritchie Eunice Briet

Cell Wall & Plasmodesmata Biology 4 Honors Robyn Ritchie Eunice Briet. Function of the Cell Wall . plant cells, some bacterial cells, fungi Rigid, protective layer around plasma membrane 10-100 x thicker than plasma membrane. Function of the Cell Wall .

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Cell Wall & Plasmodesmata Biology 4 Honors Robyn Ritchie Eunice Briet

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  1. Cell Wall & Plasmodesmata Biology 4 Honors Robyn Ritchie Eunice Briet

  2. Function of the Cell Wall • plant cells, some bacterial cells, fungi • Rigid, protective layer around plasma membrane • 10-100 x thicker than plasma membrane

  3. Function of the Cell Wall • Mechanical support for the cell • Maintains shape of plant cells • Prevents excess water intake • Holds the plant up against the force of gravity

  4. Primary Cell Wall • First formed cell wall • Outermost layer • Comparatively thin and flexible.

  5. Secondary Cell Wall • Lays between the plasma membrane and primary wall • Strong and durable • Provides cell protection and support • Ex: Wood

  6. Middle Lamella • Thin layer of sticky polysaccharides (pectins) • Lays between primary cell walls • Glues adjacent walls together

  7. Plasmodesmata • Intercellular cytoplasmic bridges • Facilitates communication • Aids in the transport of materials b/w cells • Water • Nutrients • Signalling molecules • Even viruses! (Shhh!!!)

  8. http://www.glogster.com/alexanderhesekth/cell-wall-and-cell-membrane/g-6ltaq1bmv7u25246docmva0http://www.glogster.com/alexanderhesekth/cell-wall-and-cell-membrane/g-6ltaq1bmv7u25246docmva0

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