Basement Membrane

• Physical description

  • lamina lucida (rara) - 10 m thick, closest
  • lamina basalis (densa) - 20 to 50 nm thick
  • lamina fibroreticularis

• Composition

  • type IV collagen
  • glycoproteins

    • laminin and entactin
  • perlecan
  • heparin sulfate

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