A boiler is a closed vessel in which water or other fluid is heated. The fluid does not necessarily boil. (In North America, the term furnace is normally used if the purpose is not to boil the fluid.)
What are the major jobs of the digestive system? the main jobs of the digestive system system is to break down food so it can be absorbed into the blood stream and large intestine, to nourish the cells to provide energy , anâ¦d to get rid of the leftover food that the body cannot use. 4 people found this useful.
Updated April 03, 2017. Your digestive system does a lot of important work for your body. Food isn't in a form your body can readily use, so it's the digestive system that has to break it down into its parts. Through digestion, your body gets the nutrients it needs from foods and eliminates anything it doesn't need.