11. The Purpose of the Liver The liver works by producing bile. It converts glucose into glycogen, and keeps your body core temperature at 27 degrees Celsius. If your liver fails then your blood stream will build up with toxins and you could certainly almost die. The main purpose of the liver is that it cleans the blood and releases the bile from the system. How does the Liver work
13. Purpose of the Large Intestine The main purpose of the large intestine is to absorb water from the undigested food back into the blood. How does the Large Intestine work The large intestine works by collecting and processing the waste products from the food you eat, into faeces, (which is bodily waste matter derived from ingested food).