http://www.your-doctor.net/human_body/GITphysiology.htm

http://www.your-doctor.net/git/reflux.htm

http://www.se77ah.com/art-234-%D9%82%D8%B1%D8%AD%D8%A9-%D8%A7%D9%84%D9%85%D8%B9%D8%AF%D8%A9-%D9%88%D8%A7%D9%84%D8%A7%D9%85%D8%B9%D8%A7%D8%A1.html

http://www.se77ah.com/art-396-%D8%B1%D8%A7%D8%A6%D8%AD%D8%A9-%D8%A7%D9%84%D9%81%D9%85-%D8%A7%D9%84%D9%83%D8%B1%D9%8A%D9%87%D8%A9.html 

http://ar.wikipedia.org/wiki/%D8%A7%D9%84%D8%AC%D9%87%D8%A7%D8%B2_%D8%

A7%D9%84%D9%87%D8%B6%D9%85%D9%8A

http://www.sehha.com/diseases/git/constipation/constp01.htm

http://www.6abib.com/album/articles.php?topic=23

http://www.khayma.com/mtwan/gensanb.htm

http://www.moe.edu.kw/hagybat%20almalem2/edu/biology/flash/body%5B1%5D.swf