Enhance the pronunciation of your Spanish-speaking class by offering them some practice with the syllable combinations of fa, fe, fi, fo, and fu. In the first short exercise, they match the correct word to the sentence it belongs in. In...

This site from the Department of Chemistry at the Washington University provides a deetailed study of the role of hemoglobin in blood physiology. The article is somewhat in-depth, complete with pictures, charts, and a bibliography.