Another name for the alimentary canal? What is the role of villi in the alimentary canal? The role of the villi in the alimentary canal is to allow for a  greater surface area in which the absorption of nutrients can take  place. 7 people found this useful.
A person can survive only  three to five days without water, in some cases people have survived for an average of one week. It is not recommended that anyone try this at home. Once the body is deprived of fluids the cells and organs in the body begin to deteriorate.
How long can the elderly live without water? My Grandfather is like in a comma like state, and hasn't had anything to drink for about 48 hours. He also has a high fever that won't go down (103-104.4). He is in a nursing home under comfert cares.