ExtracellularMatrix

http://themedicalbiochemistrypage.org/extracellularmatrix.html

 Summary of the molecules in themammalian extracellular matrix.

Tight Junctions

 http://www.biology-pages.info/J/Junctions.html#tightOverviewof animal intercellular junctions, with reference to alterations in cancer.

Plant Cell Walls

http://www.ccrc.uga.edu/~mao/intro/ouline.htm

 Plant cell wall structure, assembly,and function.

GapJunctions

http://www.vhlab.umn.edu/atlas/conduction-system-tutorial/gap-junctions.shtml

 An overview of the role of gap junctions,with an emphasis on heart muscle.