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Question

Where does squamous epithelium form a selectively permeable surface?


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Solution

Squamous epithelium :

  1. Squamous epithelial cells are huge, flattened cells with a tiny spherical nucleus in the center, packed with the cytoplasm.
  2. They have a flat, irregularly rounded form.
  3. The name "squamous" comes from comparing the cells to the scales of a fish.
  4. These cells are usually seen lining surfaces that require a constant flow of fluid, such as blood arteries.
  5. They're also seen lining air sacs in the lungs, which require an extremely thin surface for molecules to travel through.
  6. At the lining of blood vessels, the squamous epithelium produces a selectively permeable surface.

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