 The next part is large intestine. The undigested food moves towards the large intestine. Large intestine is actually the last part of this elementary canal. In the large intestine there are also lot many folds, but this is not as highly folded as the small intestine. In the large intestine the food moves down and the cells of the large intestine absorbs water from the undigested food. So that water is actually returned back to the body and the remaining part is kept as a semi solid material. We call this semi solid material as feces. These feces are then moved down and they are stored inside the rectum for a specific time. When the rectum is full then the rectum sends a reflex to the nervous system called a defecation reflex and then these feces are eliminated. Now there are two related problems of intestinal motility particularly related to the large intestine and we normally experience these problems, diarrhea and constipation. Now we know that function of large intestine is the absorption of water from the food. If the motility in the large intestine is increased that is it is contracting and relaxation with a more speed then the result is diarrhea. What is, when the food is passing with more than a normal speed, intestine cannot absorb enough water from that undigested food and the result is a direct situation that is the loose feces have more water. The other situation on the other hand is the constipation. What happened that there is a decreased motility of food through the intestine? Certain food is moving through the large intestine slowly then large intestine absorbs more water more than normal water from that food. The result is constipation more harder feces in comparison to the normal ones. Both conditions could be treated easily. There are many medicines and there are many natural ways we can say if there are certain foods with the help of those we can normalize the intestine and motility. The other disorder we already talked about it, this is the of the digestive tract is the stomach the ulcer, ulcer could be produced at any part of the digestive tract but mainly these are the ulcers are produced in the stomach due to the action of sometimes hydrochloric acid on the walls of the stomach and ulcer is produced that is actually an injury injured part of stomach is produced. Sometimes it may occur in the astrophagus or in some other part of intestine. Sometimes in the stomach there is an infection by a bacterium called helicobacter pylori. This bacterium also can cause the ulcers for stomach though the ulcers are treatable but there are two ways to treat them number one to take medicines to reduce the acidity and the other is to we can say the preventive medicine that is do not take very spicy foods foods with which causes more acidic acid release from the stomach and so on. So this is about digestive system.