Human Excretion
 - Excretion Explained
 - Excretion Test
 - Links
Human excretion & respiration quiz
http://ekcs.neric.org/~jbuckley/lifesci/excreteqz.html
Animal excretion quiz
http://ekcs.neric.org/~jbuckley/regbio/excrqz.html
Lecture notes on homiostasis & excretion
http://www.science.lander.edu/rsfox/112excre.html
nice notes! but no pictures
Excretion notes
http://ekcs.neric.org/~jbuckley/regbio/excretents.html
The Parts & Workings of The Human Kidney
http://www.clark.net/pub/nhp/med/kidney.html
very nice site indeed! Lovely pictures, lovely notes
Human excretion & respiration quiz
http://ekcs.neric.org/~jbuckley/lifesci/excreteqz.html