The last part of the digestive tract, continuous with the small intestine, is a muscular tube about 5 feet long. It's divided into the cecum, colon and rectum and together, they tie up all the loose ends of digestion. This includes completing any nutrient absorption and processing the wastes into feces. Another important function of the large intestines is making some types of vitamin B and vitamin K. Now we look at three accessory organs of the digestion system: the pancreas, liver and gallbladder.

