1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Size of epithelia cells

  1. Mar 2, 2009 #1
    What is the approximate size of epithelia cells from the human oral cavity? And why must light intensity be low when studying them in bright field microscopy? (I know that phase contrast is better).
    Last edited: Mar 2, 2009
  2. jcsd
  3. Mar 3, 2009 #2

    Andy Resnick

    User Avatar
    Science Advisor
    Education Advisor

    Cells obtained by a 'cheek swab' are large- 30 microns across, easily. Now, in vivo (and in cultured monolayers), the epithelial cells pack together and present a cross-section closer to 10 microns.

    The intensity doen't need to be low, exactly- what is important is to filter out the IR part of the spectrum and prevent dry-out. Even so, too much light is damaging to cells- not cancer, but photodamage can occur.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: Size of epithelia cells
  1. Unit cells (Replies: 2)

  2. Cell Division (Replies: 4)

  3. Electrochemical Cell (Replies: 1)

  4. Cell Potentials (Replies: 1)