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.
Weegy: The primary function of the digestive system is to break down the food we eat into smaller parts so the body can use them to build and nourish cells and provide energy. [ [ ] ] kashton|Points 723|. User: From the trachea, air enters the , which branch out into smaller tubes called .