Respiratory System

http://www.ama-assn.org/ama/pub/category/7166.html

http://biology.clc.uc.edu/courses/bio105/respirat.htm

http://www.bmb.psu.edu/courses/bisci004a/respir/b4respir.htm

Urinary System:

http://www. bmb.psu.edu/courses/bisci004a/respir/b4respir.htmhttp://qldscienceteachers.tripod.com/junior/biology/excretory.html

http://academic.kellogg.edu/herbrandsonc/bio201/Urinary%20System.htm

http://mcdb.colorado.edu/courses/3280/lectures/class08.html

http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/K/Kidney.html

http://www.mscd.edu/~biology/2320course/2320info.htm

http://www.mscd.edu/~biology/2320course/2320info.htm

Gastrointestinal System

http://www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspzQzpgzEzzSzppdocszSzuszSzcommonzSzdorlandszSzdorlandzSzdmd_v_08zPzhtm

WEBSITE OF LIVER FUNCTIONS & DISEASES: http://www.lbah.com/liver.htm

WEBSITE ON METABOLISM: http://opbs.okstate.edu/~leach/UHSAbiochem2-02%20folder/Integration%20folder/integration.htm

WEBSITE of biochemical pathways: http://www.humboldt.edu/~rap1/BiochSupp/PathwayDiagrams/PathIndex.html

http://www.bmb.leeds.ac.uk/illingworth/metabol/