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.
Functions of the Digestive System The major functions of the digestive tract include the following six processes, summarized in Figure 1: 1. Ingestion Food must be placed into the mouth before it can be acted on. This is an active, voluntary process called ingestion. 2. Propulsion Foods must be propelled from one organ to the next.