Osmosis

Osmosis is how fluids move through membranes… like how water moves into and out of the cells in your body. Learn how it works!

http://highered.mcgraw-hill.com/sites/0072495855/student_view0/chapter2/animation__how_osmosis_works.html

http://www.stolaf.edu/people/giannini/flashanimat/transport/osmosis.swf

http://physioweb.med.uvm.edu/bodyfluids/osmosis.htm

http://www.vivo.colostate.edu/hbooks/cmb/cells/pmemb/osmosis.html