diagram showing a tight junction. Tight junctions seal adjacent epithelial cells in a narrow band just beneath their apical surface.
Mariana Ruiz <a href="//commons.wikimedia.org/wiki/User:LadyofHats" title="User:LadyofHats">LadyofHats</a>
I did the diagram myself using the information found here:<a rel="nofollow" class="external autonumber" href="http://web.fu-berlin.de/fun/2001/10-01/leute/leute6.html">[1]</a>, <a rel="nofollow" class="external autonumber" href="http://www.lionden.com/graphics/WebCT/slides1.gif">[2]</a>, <a rel="nofollow" class="external autonumber" href="http://www.biologia-it.arizona.edu/cell_bio/problem_sets/membranes/13t.html">[3]</a>, <a rel="nofollow" class="external autonumber" href="http://arbl.cvmbs.colostate.edu/hbooks/cmb/cells/pmemb/junctions_t.html">[4]</a>, <a rel="nofollow" class="external autonumber" href="http://sciencentral.us/chpt7.30Intercelljunctions.gif">[5]</a>, <a rel="nofollow" class="external autonumber" href="http://www.nature.com/nature/journal/v422/n6933/fig_tab/nature01603_F4.html">[6]</a>, <a rel="nofollow" class="external autonumber" href="http://sciencentral.us/chpt7.html">[7]</a>, <a rel="nofollow" class="external autonumber" href="http://www.nastech.com/nastech/junctions_biology">[8]</a> and <a rel="nofollow" class="external autonumber" href="http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/J/Junctions.html">[9]</a>. Image renamed from <a href="//commons.wikimedia.org/w/index.php?title=File:Cellular_tight_junction.svg&amp;action=edit&amp;redlink=1" class="new" title="File:Cellular tight junction.svg (page does not exist)">File:Cellular tight junction.svg</a>