Changes

'''Digestive System''' refers to any series of organs used in organisms to take in food, extract needed energy, and discard waste.

'''Digestive System''' refers to any series of [[organ|organs]] used in [[orgainsm|organisms]] to take in food, extract needed [[energy]], and discard [[waste]].<ref>http://digestive.niddk.nih.gov/ddiseases/pubs/yrdd/</ref>