Following are a few tutorials and animations on red blood cells, hemoglobin etc.
http://www.wisc-online.com/objects/ViewObject.aspx?ID=ap14604
From Get Body Smart:
http://www.getbodysmart.com/ap/circulatorysystem/blood/rbcs/menu/menu.html
A microscopic view of RBC and bone marrow disorders. Great slides on the various anemias with anecdotal information.
http://library.med.utah.edu/WebPath/HEMEHTML/HEMEIDX.html#2
And from the Franklin Institute:
http://www.fi.edu/learn/heart/blood/red.html
Blood:
http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/B/Blood.html
